That are the .desktop files:
The one above has a exec line where the path doesn´t exist and the one below uses a command which shows that it is not installed.
I've installed imagemagick now and got not errors for the new .desktop file.
The texdoctk problem seems to be a bit older and the package you need to install is big...
Unfortunately, I'm currently dealing with some more serious issues. The entire desktop has frozen twice today and I had to make a hard shutdown, and five minutes ago, after putting it to suspend, all I got was a black screen...In Zorin 18.1 live session that laptop had worked really well..