I’ve tested it now, and it seems to work great, thanks!
One detail is that the entire macro crashes if you try to export an empty filter (which could be desirable in some situations), so perhaps this should be possible, or at least it should only return some error code instead of crashing the entire macro? (it’s still no show-stopper for me since I can just check the filter count and then delete the file instead, but it still might be more robust through)
An error code might perhaps also be preferable to crashing the entire macro (which currently happens) if you try to import a filter file that does not exist?