Actually, you can have infinite number of installs of Sub Command and Dangerous Waters installed, you just need to understand the registry.
I bought SC when it came out and this is how we did it when SCX was born which proceeded the very well designed JSGME/SH3. If I had many little mods, I was turning on off I would consider JSGME. It is very nicely done.
But as I said we didn't have it. I supposed I and Sub Command one day will end up in a case in the Smithsonian next to Bill Nichols and the Nautilus.
https://www.subsim.com/radioroom/sho...d.php?t=247248