End User License Agreement (EULA)

1. Preamble & Anti-Landlord Covenant

This End User License Agreement (“Agreement” or “EULA”) constitutes a legally binding contract between you (either an individual merchant, store proprietor, or corporate entity, hereinafter “Licensee”) and Wintershogun Studio (hereinafter “Licensor” or “Studio”), governing your download, installation, and operation of Lyndesk Point of Sale (POS) & Business OS and related compiled binaries.

By downloading, installing, or executing Lyndesk, you agree to be unconditionally bound by the terms of this Agreement. If you do not agree, do not install or use the software.

2. Free Community vs. Commercial Editions

Wintershogun Studio distributes Lyndesk under two distinct distribution models:

• Linux Community Edition (Free Forever): Compiled native Linux packages (.deb, .rpm, .pkg.tar.zst, standalone binary) distributed free of charge for community, educational, and independent business counters. Community users may execute the software without license key activation.
• Windows & Android Commercial Editions: Commercial software packages requiring a one-time perpetual license fee. Payment grants a cryptographic offline activation key valid for the lifetime of that major software generation.

3. Perpetual License Grant & Offline Verification

Upon payment of the applicable one-time license fee through wintershogun.tech, Wintershogun Studio grants the Licensee a perpetual, non-exclusive, worldwide, irrevocable license to execute the software on designated terminal hardware.

Offline Mathematical Verification: Commercial license activation is verified entirely offline using public-key cryptographic signatures compiled into the native binary. Lyndesk will never disable active checkout registers, pause transaction counters, or contact external telemetry servers to re-authenticate paid licenses.

4. Prohibitions & Reverse Engineering

Except where explicit source code grants are provided under open licenses, Licensee covenants that they shall not:

• Decompile, disassemble, or reverse-engineer commercial proprietary modules for the purpose of subverting licensing controls or commercial resale.
• Distribute, lease, sub-license, or publish commercial cryptographic license keys publicly or across unauthorized secondary third-party channels.
• Remove, alter, or obscure proprietary copyright notices, trademark symbols (冬将軍, Lyndesk®), or authorship declarations embedded in the software.

5. Local Data Storage & Backup Custody

Absolute Data Custody: Lyndesk operates strictly on the local machine. All customer data, sales records, stock valuations, and financial ledgers are written to a local SQLite database utilizing Write-Ahead Logging (WAL) mode (~/.local/share/lyndesk/lyndesk.db on Linux; %APPDATA%\lyndesk\lyndesk.db on Windows).

Licensee Backup Responsibility: Because Wintershogun Studio maintains zero remote telemetry or cloud databases, the Licensee bears sole and complete responsibility for maintaining periodic cold backups of their database file to external media. Wintershogun Studio possesses no technical ability to restore lost files resulting from hardware failure, operating system reformatting, or disk degradation.

6. Hardware Key Relocation Policy

If Licensee upgrades cash register hardware, replaces a solid-state drive (SSD), or relocates counter terminals, Licensee may transfer their perpetual license key to the replacement hardware without paying additional licensing fees. Simply copy the local database to the new machine and apply your license key. Assistance is provided via [email protected].

7. Disclaimer of Warranties

Wintershogun Studio expressly disclaims all implied warranties of merchantability, fitness for a particular commercial purpose, quiet enjoyment, and non-infringement.

While Lyndesk is designed for rigorous accounting accuracy and sub-50ms counter responsiveness, Licensor does not warrant that the software will be completely error-free, uninterrupted, or compatible with every non-standard or proprietary ESC/POS peripheral, USB cable, or third-party operating system distribution.

Tax & Statutory Compliance: Licensee remains solely responsible for verifying tax percentage calculations (such as VAT, GST, or State Sales Tax) and formatting printed invoices in compliance with their local municipal, provincial, and national statutory accounting regulations.

8. Limitation of Liability

Under no legal theory—whether in contract, tort (including negligence), strict liability, or otherwise—shall Wintershogun Studio, its guild engineers, or proprietors be liable to Licensee or any third party for:

• Indirect, incidental, consequential, special, or exemplary damages;
• Loss of revenue, anticipated profits, business interruption, or commercial goodwill;
• Loss, corruption, or inaccessibility of local transactional data or accounting ledgers;
• Hardware malfunctions, peripheral communication failures, or thermal printer paper jams.

In any event, Wintershogun Studio’s cumulative aggregate liability arising out of or related to this Agreement shall be strictly capped at the actual amount paid by Licensee for the specific software license during the preceding twelve (12) months.

9. Governing Law & Jurisdiction

This Agreement shall be governed by, construed, and enforced in accordance with the substantive laws of the Republic of India, including the Information Technology Act 2000 and the Indian Contract Act 1872, without regard to principles of conflicts of law.

Any dispute, claim, or controversy arising out of or relating to this Agreement shall be subject to the exclusive personal and subject-matter jurisdiction of the competent civil courts located in Davangere, Karnataka, India.