
Board: M.U.G.E.N Development Help
When this happens to me, I use both FF3 and NotePad to fix it. Use FF3 to save the SFF file as the different versions. MAKE SURE you have them named differently and that you'll remember what's what.
Once you have the different versions saved, close FF3. Open the Def in a text editor and set the sff file to one of the new files.
That Should do it, but there's a chance you'll need to do one more edit