Hmmmm, I'm sorry that it keeps happening, sadly I don't have the knowledge or tools to create some kind of auto save, unless it doesn't save at all when you choose to save. I've never heard of that. I do know that sometimes it freezes but that's only when I play test it from the actual RPG maker. I'm sorry to say it might be your computer but I don't know how or why that would even happen. If it helps I have built in a tiny version of me at the start of the game that can unlock things so you don't have to replay it if you lose your save data. I hope this is understandable.