08 july 2017 Release
Ubooquity 2.1.0 is available.
This is the first 2.x stable version. If you were still using version 1.x, you should now be able to upgrade without taking too big a risk. And in any case, should you need them, previous versions are still available for download.
(since 2.0.2)
If you upgrade from Ubooquity 1.x, read the 2.0.0 release notes, as they contain important information about database and preferences format changes (in a nutshell, you'll have to reconfigure Ubooquity and rescan your collection).
The documentation has also been updated to reflect 2.x modifications.