Numbering files in AIMP Audio Converter?

[subs]

I am converting a single .m4b file to multiple .mp3 files and AIMP Audio Converter does this correctly based on the chapter information embedded in the .m4b file.

My only problem is numbering the new files to keep them in the original order.

%TrackNumber just puts 1 on every file.

I'm not sure what %Inc(A,B) does. I tried %Inc(1,1) thinking it might start at 1 and increment by 1 for each file, but it just put 2 on every file.

Is there a way to simply number the extracted/converted files in order?

[Artem]

Use %Index macro