Hi, and welcome. ?
In general, Win95 is much more stable than Win98. Most important piece of advice: always shut down your Win95 session properly, and when it says “it’s safe to turn your pc off” wait a couple of seconds before you do, because it’s actually not safe yet. And it’s best to back up your Windows image file regularly, in case it gets corrupted (wish it had been so easy back in the Win95 days).
Regarding the game, there isn’t nuch advice we could give you. You should definitely reinstall the whole game, not just swap the iso image.