For any non-german speaker, the most important innovation of this release (version 3.0) is that Citavi is now bilingual: with two simple mouse clicks, you can change the GUI language from German to English or vice versa.
Another rather hidden improvement is the possibility to install Citavi on a USB stick and carry it wherever you want.
I will not describe the other (intriguing!) new features since they are neatly listed here [well sorry, it seems that the english version of the site is not yet up and running, but you can nevertheless download the free version here, it will also run in English.] and explained on video here.