- Added software.php for managing software versions, including download and purchase actions.
- Created upgrade_paths.php for handling upgrade paths management.
- Developed user_licenses.php for managing user licenses.
- Introduced version_access_rules.php for managing access rules for software versions.
- Implemented frontend functions in functions.js for interacting with the software upgrade API.
- Added version_access.php for user access validation and license management.
- Created upgrades.php for displaying available upgrades and handling user interactions.
- Enhanced UI with responsive design and progress indicators for downloads and purchases.
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