Hello,
In past I installed IntelliJ and later I removed it. Now I have in App Launcher link to non-existing app. So when I click on it, it shows me "Program cannot be found" error message. Is here any way how to remove it?
Thanks for reply.
Here is image of error I got

Umm... is there a local shortcut?
as in "/home/username/.local/share/applications/"... then delete that app.desktop file
otherwise remove it from "/usr/share/applications/"
trust that helps...