It seems to be happening for a bunch of my files. I can de-select IGES but then it will come up with an error about STL, or SAT or whatever is still selected as an export option.
hmmm my guess is that the target file name is invalid. I see some other reported issues along the same lines. I'll have a look at adding the requested sanitizing method.
I seem to have the same error. See attached screenshot.
--- Edit ---
After further checking, the problem was traced to an invalid character (backslash) in the design name. Have added a function to sanitise filenames and it now works.