Can't Delete Levels?

[Whole Wheatley]

So there's this rare issue where levels will only show up in SMBX's editor but not in the Worlds folder. The common fix for this is to delete the Worlds folder and reinstall SMBX. I tried both of these and it seemed to work, but then I saved a new level to test it and the previous files came back. What's really weird is that the new level shows up in the folder.

Screenshots:

Spoiler: show

[Zenithbreak]

Try clicking on the "compatibility files" button.

[Whole Wheatley]

That worked. Thank you.