I have those three dots on one of the accounts, but not on the account I’m trying to remove.
While I do have the tree dots on my other account, there is no Remove account-choice, only Remove folder sync connection.
You can see the three dots are missing on the last pic in my original post.
Also, I’ve tried purged the installationen of the desktop client, and then reinstalled.
No change. Remove account is still missing.
Just installed the AppImage from the official repo nextcloud.com, after purging the install and removing the repo.
I now have a completely different-looking desktop client, the left-click works and also have an update-button under the General settings.
I also have a slightly older desktop client.
This is v3.3.6 while my previous was 3.4.0.
So far, I’m tentatively optimistic about the function!