- Added support for Memcached
- Added GDPR-related features (ToS acceptance, account self-deletion, reports)
- Added a limit on the number of mail items processed per run
- Added the possibility to limit concurrent users per branch
- Branch administrators can now create course categories alongside courses
- Fixed issues about removing non-empty skill categories
- Fixed content with unit timers sending additional completion requests to the server
- Fixed issue about empty units when removing all data from the editor
- Fixed issue copying skills when cloning questions
- Fixed issue about bubbles in matrix questions
- Fixed issue about error displayed on creating a user with a login that already exists
- Fixed error while trying to set an audience rule for a custom profile field of type checkbox, under PHP 7+
