Happy new year! Within this version you can now login by your primary email address instead of the username. Therefore go to the security preferences and active the preference Allow e-mail address instead of username for login .
We recommend you to read our announcements for version 4.3 if you have not done before.
A full list of all new features and bugfixes can be found in our issue tracker for version 4.3 and 4.3.13!
Full Changelog: https://github.com/Admidio/admidio/compare/v4.3.12..v4.3.13
If you are new to Admidio and want to install it on your webpage than the following wikipage could help: Install Admidio
The following wiki pages maybe interesting on an Update: Update Admidio