Ok, I think I need some help here. So I downloaded a CSO pack. I put in the right folder but before that, I interacted with a .ovl file called "ShopIcons" or something of that matter. I clicked on "cancel" and then I put the CSO folder in the correct place. When I opened up the game an error came up. Plus I was on the first pop-up out of 483! So I clicked "OK" on all of them and another error came up saying the game just crashed. Please help.

try deleting the file and downloading it again, if it still don't work, find a different file with the same contents

~Stilez

Actually, it's not the file. I deleted it and it still came up.

i recommend downloading ccleaner and clean your computer of all the crap. just google it

Trash your current Themed folder and replace it with the Themed backup you made before the 400 pop-ups. It seems whatever has happened might have corrupted one or several of your other files in Themed.