How can this be an unknown file type?

[ajax]

(06-13-2024, 10:43 PM)Ofnuts Wrote: ...
Do you see the file type listed in the file type selector?
...

No!  That list is completely empty.  Contains nothing.

I'm afraid that list is something I can NOT remember ever using.  However, because I run GIMP in portable fashion I am able to run other versions.  This shows me there should be a rather long list of possible file types.

Is there a simple explanation that might allow for fixing the problem or am I stuck with reinstalling GIMP?  Also, it must be something that I caused without knowing.  What about causes?  Are there known, apparently improper actions, that would cause this problem?