Imported, thanks!
This was a good exercise as it raises a few issues around sharing snapshots. I used File->Import Snapshot to load it, and that went fine, but only because I had your session loaded, with audio tracks in 1-7. My usual session has MIDI tracks in 2 and 3, so it would have failed to load those tracks since the file types didn't match. Snapshot folders aren't completely self-contained, they need to be loaded into a compatible session. Two things would be nice here:
1) A more relaxed snapshot loader that tries to find the best target tracks for each snapshot track if they don't happen to line up by number. So in my case the snapshot track 1 would have gone in track 1, but snapshot tracks 2-4 would have gone into my tracks 4-7, skipping over the two midi tracks I have in between.
2) A snapshot export package that includes the definition of the session it came from. It wouldn't need everything, just enough to recreate the track organization that the snapshot expects. This would actually be more of a session export, or rather a "slice" of a session that contains a single snapshot. Loading that isn't exactly the same as loading a snapshot, it's more like importing a session, that has a snapshot in it.
Once the snapshot was loaded, we're now faced with what to do with all of these stopped tracks. I assumed that tracks 2,3,4 were intended to be started at the same time, and yes they played together when I used GlobalPause to unpause them all at the same time. But I think it's kind of non-obvious that you're supposed to use GlobalPause for this. Maybe a menu item like Snapshot->Resume and a SnapshotResume bindable function instead.
BTW, if you're ever in need of a quick way to do something to several tracks at the same time without stopping and writing a script and assigning a binding to it, you can use the Script->Console window. I don't talk much about this but it's basically an interactive script that I use all the time for testing. After loading this snapshot, bring up the console and type:
> in 1,2,3,4 Start
and hit Enter. The tracks all start.