West Coast USA Reset

So I was messing around with the world editor in West Coast USA and I ended up deleting half of the map, and somehow it saved that way even though I told it I didn't want it saved. I've tried everything to get it back and nothing has worked. What should I do?
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i wish i could help but it seemsw i cant and I also seem to be the only one that cared enough to say anything. that must suck.

 

its okay I actually just recently fixed it by clearing the cache so apparently that's how you reset maps