I noticed that filename characters are being replaced differently depending on which function you use. E.g. with the '*' character in a track title. When you use the 'Convert to...' function this character is being replaced with '_', however, when you use the 'Rename To...' function 'x' will be used.
Just a minor bug ;-)
P.s. also notice the inconsistent capital use for both function names ('To...' vs. 'to...').