Some more tweaks and small changes to further optimize AdRotate version 3.7.3.
For those who are having trouble upgrading from 3.7.2 or older there is now a button to trigger an upgrade manually. Use this only if the database version numbers mismatch.
[new] Manual trigger if database upgrade fails
[change] Improved version checking for upgrades
[change] Improved debugging info for settings
[change] Improved check if all tables are present
[fix] unserialize error when creating ads in some rare cases
[i18n] Various translation strings have been added, changed or removed