"in there" - you mean MTool?
If you want the regular version, you don't have to put anything anywhere. Just run player.exe and everything should work
But sounds like you took away the .exe from the game folder
With MTool you have to throw the game's executable into the running MTool application
View attachment 4581743
You may need an additional resource pack for this engine if you don't have it, but MTool should offer to download them automatically