F-Droid is not providing any install/uninstall button at the top.
If I look at the different versions, I can update, install or downgrade one.
That means f-droid thinks, there is another version if the apk already installed?
I have apk extractor not installed and it (as far as I know) never was.
Was the signature process changed some time ago?
A lot of f-droid apps, are listed as “no version with compatible signature” signature. But maybe I installed it via google play.
Cleaned up some other unrelated apps I currently not need and now I can install apk extractor. ???