Like @tbone mentioned, I share my Dopus configuration to another PC. The second PC lacks the same programs (.exe) files that are on the first PC.
I want to hide toolbar buttons if the exe is not found in the expected location. I could not find an simplistic way to do this from the aforementioned posts. Perhaps I am missing something with the @hideif modifier syntax?
In former versions of DO, I think I changed the Smiley icon to be a "blank". It was (still is?!) used as default for not existing external icon references (exe files e.g.). This results in blanks on your toolbar like this, if the application is missing.