I’m betting that you are the anonymous poster here:
Passport Music Trax and AudioTrax were budget versions of MasterTracks Pro. I have no idea if MTP can open those files or convert them. I have a feeling that most MTP users don’t even know about those old versions, probably why no one responded to your question. Unfortunately, Don Williams didn’t answer either which would have been ideal seeing how he wrote the original versions.
There’s an article on the old hardware requirements here:
Article from Sound On Sound, March 1992 I suggest going back and asking if anyone with a working version of MTP can try and convert a file for you. I’ve done this for Encore and MusicTime users. If someone can do the conversion, then you can work out a deal to convert all.