Hey, I may be wrong, but I believe my current version everything installed on the portable SSD. Maybe some of the midi synth sound generation ended up on the main disk but all realtracks are on SSD. I haven't experimented trying the same version across different machines but I believe it would work, you may need to verify both copies with a serial. But I belive PGmusic allow that.

Another thing to bear in mind, if you're cross grading you will need to install over the top of previous years. So I imagine you would still be able to boot up 2024.