I had this issue on multiple PC now, so I create a thread about it.
Everytime, when upgrading an installation there seems to be an issue with the profile. I upgraded a KD latest stable to the latest prerelease (KD 2.1.7). After the upgrade, I changed the downloadbehavior from “open after download” to “ask on every download”.
The settings were saved, but they didn’t work. Every download was still opened directly (=old profile settings).
So I deleted the profile, deleted the Kopano Deskapp folder within the userprofile and made a completly new profile.
Now it is working.
Can nobody reproduce this?