I was making a map on the sets studio and i pressed a button with a folder opening and after i pressed that all my hard work was gone and i couldnt undo or bring it back please help me i spent over 2 hours on it!

hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

Well, in short, you're screwed. Basically, what you did was open the "load file" button, and clicked a blank file. This erased your data. Sorry dude, no chance of getting it back, but there's always a second time!