AI PIXELL Desktop Client End User License Agreement (EULA)

Effective date · June 29, 2026

This End User License Agreement (this “EULA”) is a legal agreement between 4BY4 Co., Ltd. (the “Company”) and the person who installs, accesses, or uses the AI PIXELL Desktop Client software (the “Software”) (the “User”).

If the User installs, copies, runs, or uses the Software, the User is deemed to have agreed to all the provisions of this EULA. If the User does not agree, it may not install or use the Software and must immediately delete all copies.

Use of the Software is governed jointly by this EULA and the “AI PIXELL Terms of Service.” This EULA governs matters concerning the installation, execution, and licensing of the desktop software, while the Terms of Service govern matters concerning the Service as a whole, such as accounts, payment, and personal information. The full text of both documents is available on the installation screen and at aipixell.com.

Article 1 (Definitions and Scope of Application)

“Software” means the client application AI PIXELL for desktop operating systems (Windows, macOS, etc.) provided by the Company, including all of its updates, patches, and documentation. The Software is distinct from the AI PIXELL on-premises software (a server-installed product) provided separately by the Company.

“Service” means the ancillary functions provided by the Company in connection with the Software, such as license verification and activation and model downloads. (As of the effective date of this EULA, cloud processing and APIs are not provided through the Software; if provided in the future, they will be governed by the then-amended terms and the Terms of Service.)

“User Content” means all images, videos, and metadata that the User inputs, processes, or generates through the Software.

“Terms of Service” means the “AI PIXELL Terms of Service” that apply to the Company’s AI PIXELL services as a whole (a single, integrated account encompassing the SaaS at detailer.aipixell.com and the Desktop Client at aipixell.com). An account registered by the User in either service applies commonly to both services.

Article 2 (Grant of License)

Subject to the User’s compliance with this EULA, the Company grants the User a limited, non-exclusive, non-transferable, and non-sublicensable license to install, run, and use the Software within the scope of the license type acquired by the User and the subscribed plan.

License Types.

Perpetual License: the right to use, without a time limit, the version at the time of purchase and the free updates under Article 4(5)(1), acquired through a one-time purchase. “Perpetual” does not mean the free provision of major upgrades (Article 4(5)(2)), and its scope is clearly notified before purchase. This license does not terminate upon the expiration, cancellation, or non-payment of separate paid services such as a cloud subscription (Articles 10 and 11).
Subscription License: used during the subscription period (monthly, annual, etc.) and terminates upon the expiration, cancellation, or non-payment of the subscription.
Free Trial License:
- Granted only once per member (account). The Company may determine whether duplicate provision has occurred by comprehensively considering account and device identification information (HWID) and the like, and may restrict the provision of a trial in the event of repeated attempts to receive it through re-registration after withdrawal, creation of multiple accounts, and the like.
- The validity period is 14 days from the time installation of the Software is completed, and it automatically expires and becomes unavailable upon the lapse of 14 days regardless of network connection (including in an offline state).
- During the trial period, the User may use the Software without feature restrictions. The specific benefits of the trial license are notified by the Company through a separate information page.

※ As of the effective date of this EULA, the Company provides perpetual licenses, and subscription licenses may be provided later. When subscription licenses are provided, item (2) of this Article and the relevant provisions of Articles 10 and 11 apply.

Scope of Use.

Non-Commercial Plan: non-commercial, personal use by the single User itself.
Commercial Plan: commercial use within the scope of persons and machines granted by the Company.

Activation and Device Binding.

A paid (perpetual or subscription) license may be bound to and used on one PC per license. A free trial license is also HWID-bound to one PC upon installation; given its nature as a once-per-member, 14-day-limited offering, the PC transfer (license transfer) procedure under item (3) of this paragraph does not apply.
During installation, the Software activates the User’s client ID and license, and once installation is complete, it can be used immediately without a separate login. Upon activation, the hardware identification information (HWID) of the User’s PC is collected to bind the license to that PC. The processing of collected information such as HWID is governed by the Company’s Privacy Policy and the Terms of Service.
PC Replacement (License Transfer): PC replacement (license transfer) applies separately to each license. A free trial (time-limited) license may not be transferred to another PC. For a paid license, the User may replace its PC once per 365 days, counted from the activation time of that license (the time installation is first completed). To replace, the User must (i) request deactivation of the license on the existing PC in the desktop app, (ii) confirm the completion of deactivation on the My Page at aipixell.com, and then (iii) install and run the Software on the destination PC through the reissued download link (an installation file containing the user ID and license). Additional installation or activation while the existing PC has not been deactivated is not permitted. Where the User cannot deactivate by itself due to a malfunction, loss, or theft of the existing PC, the User may request deactivation from customer support after an identity verification procedure, and the Company processes it within a reasonable period. The Company may monitor the frequency and pattern of this procedure to prevent abuse.
GPU Use: the Software uses only one GPU within the device and, by default, automatically selects the higher-performance GPU (it does not support concurrent multi-GPU processing). A feature allowing the User to directly designate the GPU to be used may be provided later. The GPU is not included in the license binding; accordingly, the User may freely replace, add, or remove the GPU, and no license deactivation, reissuance, or reinstallation is required as a result.
The license is bound to the core hardware identification information (HWID, excluding the GPU) collected at the time of installation. The hardware components used for binding and the scope of changes requiring re-binding (reissuance and reinstallation) are notified by the Company through an information page; ordinary peripheral connections, driver updates, and GPU replacement, addition, or removal do not constitute grounds for re-binding.

The User may not share, transfer, or lend its own account or license key to any third party, and must not allow access by any third party beyond the persons granted. General account operation is governed by the Terms of Service.

All rights not expressly granted are reserved by the Company. The Software is licensed, not sold.

User eligibility (age, etc.) is governed by the Terms of Service.

Article 3 (Use Restrictions and Prohibited Acts)

The User may not engage in the following acts and agrees that a violation will result in civil or criminal liability. This does not apply, however, to the extent expressly required by applicable mandatory law:

modifying, translating, reverse-engineering, decompiling, disassembling, deriving the source code of, circumventing, or dismantling the Software;
copying, downloading, storing, posting, or transmitting the Software beyond the scope permitted by this EULA;
renting, leasing, lending, selling, transferring, redistributing, sublicensing, or hosting the Software or any copy thereof;
developing, training, tuning, validating, or evaluating an artificial intelligence or machine learning model using the outputs or embedded models of the Software or Service, without the Company’s prior written consent;
repackaging the processing functions of the Software and providing them through a third-party service without the Company’s prior written consent (Model-as-a-Service, etc.);
circumventing or neutralizing technical protection measures such as license verification, activation, usage limits, DRM, and device binding, and providing or distributing tools that enable such acts;
removing, altering, or concealing copyright or trademark notices, watermarks, identification information, and the like;
abnormal use through automated tools, causing excessive load, or interfering with the Service; and
other acts prohibited by applicable law or the Terms of Service.

Article 4 (Automatic Updates, Online Communications, and Scope of Update Provision)

The Software may communicate with the Company’s servers over the internet to operate normally, maintain security, verify licenses, and report errors.

The Company may, where necessary, distribute updates to the User after prior notice for security patches, fixes, feature improvements, and the like; this is not an obligation of the Company. Emergency security updates to address critical security vulnerabilities may be applied automatically without prior notice. Important feature changes are notified by in-app notification or email a reasonable period in advance.

The User consents to the Company’s collection and processing of the following data during the Software’s automatic communications:

License Verification and Activation: license key, device identification information (HWID), activation time.
Telemetry: OS and hardware specifications, app version, usage metrics.
Error Reports: crash logs, stack traces, error context (no personal information included). The retention period and processing method are governed by the Company’s Privacy Policy and the Terms of Service. Where device identification information (HWID) and the like collected under this paragraph and Article 2(4) constitutes personal information, the items, purpose, retention period, and destruction of such collection are processed in accordance with the Company’s Privacy Policy, and the necessary consent is obtained.

Discontinuation of Support/Activation Servers and Assurance. Where the Company intends to suspend or discontinue the operation of the Software or the license activation server, the Company may suspend or discontinue such operation after notifying the User at least 30 days in advance by an appropriate method such as in-app notification or email. Even where the Company discontinues support for a perpetual license or suspends the operation of the activation server, the User’s local (offline) use of a perpetual license that was already duly issued continues to be assured. In such case, however, new updates, patches, model refreshes, and online ancillary functions are not provided.

Scope of Update Provision (Based on Perpetual Licenses).

The following are provided perpetually at no additional charge: security patches, bug and defect fixes, stability improvements, and updates that improve processing speed and UX/UI without changing output quality, within the scope of features at the time of purchase.
The following may be provided for a separate fee: AI model upgrades that substantially improve output quality (quality-enhancement results), and the addition of new processing features.
The Company notifies in advance the classification of each update as (1) or (2), and does not subsequently convert to paid an update that has already been announced as being provided free of charge.
The Company does not unilaterally remove core features that were provided at the time of purchase of a perpetual license on the ground of an update (exceptionally, where unavoidable for legal compliance, security, third-party license changes, and the like, this may be applied after prior notice).

Request to Submit Logs for Error Diagnosis. When an error occurs, the Company may request the User to submit log files in order to identify the cause and to improve and resolve it. Logs submitted by the User are intended to include system and technical error information that is not sensitive information (for example, error messages, processing environment, and operation records), and the Company uses them solely for the purposes of error diagnosis and service improvement and resolution. Specific matters concerning the collection, use, and retention of logs are governed by the Company’s Privacy Policy.

Offline Use and Re-Verification of Perpetual Licenses. A perpetual license may be used even in an environment without an internet connection. As of the effective date of this EULA, the Company does not require periodic online re-verification for perpetual licenses. The Company may introduce a periodic online re-verification policy in the future, in which case it will notify the User in advance of the re-verification cycle, grace period, and the like; such policy applies only to versions installed or activated after its effective date and does not apply retroactively to versions already installed. In no event does the online re-verification requirement override paragraph 4 of this Article (assurance of local use upon discontinuation of support/activation servers), and during any period in which the activation server is not in operation, local use continues to be assured without re-verification.

Article 5 (User Content and AI Training Policy)

All rights and responsibilities with respect to User Content belong to the User, and the Company does not claim any ownership or copyright and bears no responsibility whatsoever in connection with User Content.

Local-Only Processing. As of the effective date of this EULA, the Software processes User Content only within the User’s computer and does not upload or transmit User Content to the Company or any external party (the license verification and telemetry data under Article 4 are exceptions). Where the Company provides a feature entailing content transmission, such as cloud processing, in the future, the use of such feature and the related data processing are governed by the then-amended terms and the Terms of Service.

The Company does not use User Content for the purposes of training, tuning, validating, or evaluating an artificial intelligence or machine learning model without the User’s express written consent (including electronic consent) (given the local-only processing structure, the Company does not, in principle, access User Content).

The User warrants that it holds lawful rights to all User Content it processes, that the User Content does not infringe any third party’s intellectual property rights, rights of publicity, or personal information, and that it does not contain illegal information prohibited by applicable law.

Protection of Content Provenance and Authenticity. The User must not use the Software for the purpose of circumventing, removing, damaging, or concealing the source attribution of third-party content (for example, C2PA content credentials), watermarks, or authenticity and rights-management identification information.

Other general matters concerning User Content (prohibition of inappropriate content, backup responsibility, etc.) are governed by the Terms of Service.

Article 6 (Open-Source Components)

The Software may include open-source components, which are subject to their respective license terms. In the event of a conflict with this EULA, the open-source license prevails with respect to that component only.

The list of open-source components and the full text of their licenses are available in the menu within the desktop application or in the installation folder.

Article 7 (Intellectual Property Rights)

All intellectual property rights in and to the Software and Service and the AI models, algorithms, code, databases, documentation, designs, UI, trademarks, and logos included therein are reserved by the Company or the third parties that have licensed them to the Company.

The rights granted to the User under this EULA are limited to the license under Article 2.

Article 8 (Disclaimer of Warranties and Limitation of Liability)

The Software is provided “AS IS” and “AS AVAILABLE.” To the maximum extent permitted by applicable law, the Company disclaims all warranties of merchantability, fitness for a particular purpose, non-infringement, accuracy, and continuous availability.

The Company does not warrant that the results of use will meet the User’s expectations or that they will be free of errors or defects.

To the maximum extent permitted by applicable law, the Company and its officers, employees, affiliates, and licensors are not liable for any indirect, incidental, consequential, special, or punitive damages (including loss of revenue, business interruption, loss or damage of data including User Content, and inability to use). The User is responsible for maintaining an original backup of the device on which the Software is installed, before and during use. In addition, the User has a duty of care to sufficiently check and manage matters such as heat generation and other system stability when the Software runs, with respect to the device on which the Software is installed and operated (storage devices, GPU, etc.), and the Company bears no responsibility whatsoever in this regard.

The Company’s aggregate total liability under this EULA does not exceed the greater of (i) the amount actually paid by the User to the Company during the 12 months immediately preceding the event giving rise to the claim and (ii) the amount paid by the User to acquire the relevant license. However, where applicable consumer protection laws provide for higher liability, such laws govern.

The limitations of this Article do not apply to damages caused by the Company’s willful misconduct or gross negligence, or to other liability for which applicable law prohibits exemption.

Article 9 (Indemnification)

The User shall compensate for damages and costs (including reasonable attorneys’ fees) incurred by the Company or the Company’s related parties due to the following, for reasons attributable to the User (excluding the portion attributable to the Company). This Article does not impose on the User an obligation to defend a lawsuit on behalf of the Company, and the Company may defend at its own cost and control:

the User’s breach of this EULA or the Terms of Service;
infringement of third-party rights due to User Content processed by the User;
the User’s unlawful or improper use; and
the User’s violation of applicable laws (including export control laws).

Article 10 (Term and Termination)

The license under this EULA takes effect upon the commencement of installation/use and remains valid until termination.

The User may terminate this EULA at any time by deleting the Software.

Termination by License Type.

Perpetual License: may be terminated without a refund in the case of (a) the User’s material breach of this EULA (including, but not limited to, violations of Article 3 and Article 5(4) and (5)) or (b) a violation of Article 12 (Export Control and Legal Compliance); and is terminated only in the case of (c) the completion of a refund. The expiration, cancellation, or non-payment of separate paid services such as a cloud subscription does not terminate the perpetual license itself; in such case, only the scope of online ancillary functions and new updates provided may be restricted.
Subscription License (when provided): automatically terminates upon the expiration, cancellation, or non-payment of the subscription, or upon account termination under the Terms of Service.
Free Trial License: automatically expires upon the lapse of 14 days under Article 2(2)(3).

Upon termination, the User must immediately discontinue use and delete all copies (including backups and archives). This does not apply, however, where a perpetual license is maintained without any of the grounds under paragraph 3(1).

Even after termination, provisions that by their nature must survive (Articles 3, 5, 7, 8, 9, 12, and 14) continue to be valid.

Article 11 (Payment, Refunds, and Withdrawal of Subscription)

General payment matters, such as plans, license purchases, payment, and automatic renewal, are governed by the Terms of Service.

Desktop Paid License Refund Policy (the Company’s Own Policy).

The Company provides a full refund within 7 days (168 hours) of payment for perpetual and subscription license payments.
The refundable period is 7 days (168 hours) from the time payment (purchase) of the relevant paid license is completed. The installation/use history of a free trial license and whether the app was actually run do not affect the calculation of this refund period.
Where the above period (7 days / 168 hours) is exceeded, no refund under this own refund policy is provided.
However, the refund restriction under this paragraph does not affect the consumer’s rights guaranteed by a defect in the Software, reasons attributable to the Company, or other applicable laws (the Act on the Consumer Protection in Electronic Commerce, the Civil Act, etc.).
Prevention of Abuse: where abuse or improper use of the Company’s own refund policy (for example, a repeated cycle of purchase–use–refund) is suspected, the Company may confirm it through detection of anomalous patterns, analysis of usage records, and the like, and may restrict the application of this own full refund. However, such restriction does not affect the statutory right of withdrawal of subscription or the right to a refund based on a defect in the Software or reasons attributable to the Company, and the specific procedure follows the prohibited-acts and enforcement provisions of the Terms of Service.
Once a refund is completed, the relevant license is deactivated and use of the Software ends, and the User must delete all copies in accordance with Article 10(4). Continued use after a refund is deemed unauthorized and improper use.

Withdrawal of Subscription. The Software is digital content, and its provision commences upon completion of installation (license activation). The Company provides a 14-day free trial license per member (Article 2) as a trial opportunity and clearly notifies the refund and withdrawal conditions before purchase, thereby satisfying the requirements for restricting withdrawal of subscription under Article 17 of the Act on the Consumer Protection in Electronic Commerce. The 7-day full refund policy under paragraph 2 is the Company’s own policy that is more favorable to the User than the statutory right of withdrawal of subscription. On the payment screen, the Company clearly notifies (i) the restriction on withdrawal of subscription due to the commencement of provision of digital content, (ii) the provision of a 14-day free trial (trial use), and (iii) the 7-day own refund policy and its reckoning and exceptions, with the same content as this EULA.

Matters concerning the automatic renewal, payment, and cancellation of a subscription license (when provided) are governed by the Terms of Service.

This EULA applies equally even where the User uses the Software under a Free (free trial) license.

Article 12 (Export Control and Legal Compliance)

The User must comply with the Republic of Korea’s Foreign Trade Act and Public Notice on Trade in Strategic Items, the United States’ Export Administration Regulations (EAR), and any other applicable export control laws of each country with respect to the use and download of the Software.

The User represents and warrants that it does not fall under any of the following:

a person who resides or is located in, or holds the nationality of, a country or region designated as subject to sanctions by the Republic of Korea; and
a person listed on any applicable sanctions or prohibited-party list, such as the OFAC SDN List, the U.S. Department of Commerce Entity List, the EU sanctions list, or the list of restricted parties under the Republic of Korea’s strategic-items management system.

The User may not use or provide the Software or its outputs for the development or production of weapons of mass destruction, for military end use, or for any other use prohibited by applicable law.

In the event of a violation of this Article, the Company may immediately terminate this EULA without prior notice, and the User bears liability for any resulting damages.

Article 13 (Relationship with the Terms of Service)

This EULA applies together with the Terms of Service to the use of the Desktop Client.

This EULA governs the installation, execution, activation, device binding, automatic updates, scope of update provision, license verification, local processing, open-source components, export control, and refunds of desktop paid licenses of the Desktop Client; all other matters — such as membership registration, eligibility, plans, general payment, account operation, general User Content policy, personal information processing, general prohibited acts, and dispute resolution — are governed by the Terms of Service.

Where this EULA and the Terms of Service conflict, this EULA applies with priority with respect to the User’s use of the Desktop Client, and the Terms of Service apply otherwise. Matters not provided for in this EULA or the Terms of Service are governed by applicable law.

Article 14 (Governing Law, Jurisdiction, and Miscellaneous)

This EULA is interpreted and applied in accordance with the laws of the Republic of Korea.

All disputes in connection with this EULA are subject to the exclusive jurisdiction of the Seoul Central District Court as the court of first instance. However, for consumers residing outside the Republic of Korea, the mandatory consumer protection laws and jurisdictional rules of their place of residence may apply in priority over this Article.

Where the Company provides the Software to users in a specific country or region outside the Republic of Korea, additional terms under the mandatory laws of that region (for example, the EU Consumer Rights Directive and GDPR, or U.S. state consumer laws) may apply through a separate addendum or region-specific notice, and prevail over this EULA to that extent.

If any provision is invalid or unenforceable, that provision will be enforced to the maximum extent permitted and the remaining provisions will continue to be valid.

The Company may amend this EULA to the extent permitted by applicable law, and will provide prior notice of any amendment through the Software or the website. If the User continues to use the Software after the effective date, the User is deemed to have agreed to the amendment.

The User may not transfer its rights or obligations under this EULA without the Company’s prior written consent.