Canonical's last release was an OTA15, when UBports continued the project, OTA numbering was reset, now we reached the same amount of OTA as Canonical did (huzzah).
16.04 is referring to the release of Ubuntu LTS.
A work in progress is to upgrade to 20.04 release almost a year ago.
Because 16.04 won't be supported for much longer.
Dalton did mention a possibility to change the OTA numbering because depending on the device you use and the channel you're on it might differ.
So maybe in the future it will be more like S-21.06 or D-21.01.10
Edit: In the latest version, the background should be empty and you can access your apps by swiping from the left edge...
@libremax Sorry I might be miss understanding but do you mean moving existing topics? Think you just create a new one under the device the issue is about anything else already posted should stay where it is.