The New Version's main visible improvements are in the User Interface.
New Styling Options are now introduced, with which help the Forms for example for Conditions are now more user-friendly.
As a result of Pentesting, the Syncer now Saves Account Passwords Encrypted. It's nothing to do for you, then run ./cmdbsyncer sys self_configure after update (which you should do anyway).
Also, you need to update the requirements (if not using docker) otherwise you will get exceptions on start because of missing modules.
Account Updates
Accounts a basic Config Containers. Now you can create child instances of them.
The Child's will inherit the Credentials and other settings, but you can overwrite there stuff if needed.
This is useful, for example, if you want to use multiple DB Filters for Objects when exporting Checkmk Rules.
For Docker Users:
Cronjobs are now integrated into the Container. No need anymore to call something from outside.
Also: the self_configure functions will happen automatically, no manual step needed.
Other Changes
Fix: Fixed a bug in Checkmk Tag Export which in some cases not created not tag choices
Feat: Rewritten GUI for Tag export to be more user-friendly
Feat: Tag export now longer deletes Tags unless not configured to so
Feat: Checkmk Rule Export can now use the DB bases Filters (set in Accounts)
Feat: Checkmk Downtimes can now be set for just the current day, not only for timeranges as before.
Fix: Checkmk Folder Creation options now can create Titles
Feat: Netbox Custom Fields can now also be used for Contacts
Feat/Fix: Better Caching behavior for internal modules.
Feat: You can now configure Sentry for better logging (default off)