Leading zeros are not possible with automatic and manual track numbering

Support
1

Unfortunately, when you enable the numbering options with a leading zero (01, 02, ... ,05, ...,10), the program switches to the version with single numbering (1, 2, ... ,5, ...10) and you cannot force it to start them with a leading zero.
The same applies to inserting numbering manually - I insert with a leading zero, and the tag cell immediately "corrects" it and changes it to single numbering.

It is also annoying that you cannot find older versions on the download page (because I wanted to go back to the older version because of the bug described above), there are only about 2 very old ones - 305, 239 and 202.

2

What kind of files are these?
MP4?
The mp4 tag format does not allow leading zeros.

3

It's unfortunately not possible with the MP4/M4A format. Track numbers are stored as integer values there (basically a number) in the file instead of a numeric string (like "01") as with MP3 or FLAC.

If you want to use leading zeros when renaming files, you can always use $num(%track%,2) instead of %track%