Interesting exercise in frustration. Trying to bring that archive off side 2 of that disc has so far defeated me. Using the discs own program, has been a failure and the program itself suggests that my STart disc is corrupted, though they admit to problems with this 1st iteration of that program. Though I can see 2 archives on my copied disc, and on my PC compatible disc, and though I can see what is presumably the avecta archive, neither of my internet connected computers has a floppy drive. When I tried to copy from PC compatible disc to computer, the file wouldn't copy.
Tried unarcing the file using arc.ttp or whatever the STart disk program is. Only to find out that starting with that issue, they started using the Heidi archiver and further complicating the process, the archiver is specific to that disk. Which I took to mean that the archivers on later disk's wouldn't work with that disk.
Anyhow, Smonson, hope you're in no hurry. Out of ideas at the moment. If the header of that avecta archive is really corrupted, then I'll never get it copied. I am going to try and use the archiver from a later disk but that's for another day.