For quite some time, I've been "annoyed" by the variations of track number formats in my MP3 files. Some have just digits (my preference), some have leading zeros, some have x/y, and so on. I haven't been able to come up with an easy way to change them. Until now!
V2.51's Convert Tag-Tag function works a treat, but it took a little while to work out how to do it.
Just set the FIELD set to TRACK, and the FORMAT STRING to $add(%track%,0)
I hope this helps someone else.