Also, the title of the dialog box says “Remove From Open Other”
Is it related to Open Other… in Shotcut’s File menu?
I don’t imagine it is, so it is a little confusing.
Shouldn’t the title be: “Remove From Open With > Other…” or something?
It is to remove something you have added, but you have not added anything for that filename extension. You need to choose Other to add something.
Maybe the title is a little confusing, but this is another case of Open Other. However, it has a very different context. Don’t overthink it. Obviously, it is for this sub-menu.
I am not going to relabel it. Strings are frozen for translation, and this does not rise to the level of necessity. It is not a big deal that it is empty and nothing to remove. But when you have added an application to the Open With menu that is no longer valid, you will not regret this dialog.