When I hit ALT +1 to renumber my tracks.. they are all 101

Support
1

I always use 101 for disc 1 tracks and 201 for disc 2, etc. for the last 3-4 months MP3Tag always lists every track number as 101!?? never had this problem for a dozen years of using MP3TAG.

2

Please check the settings that you use for Alt-1 which calls Convert>Tag-Filename to rename files - renumbering is not the main purpose of this function.

If you want more detailed suggestions, please show us screenshots of the functions that you use and the extended tags dialogue of a single file.