Easy. Just extract the game zip into another empty folder and play from there.
Whether you delete or keep the old folder where you FUBARed the game by smashing several mods over each other (at least this is how it sounds), hoping this guacamole would still be able work

, is irrelevant.
In the future, after adding one mod to a game, you better make damn sure before adding another one, that the second one is not going to interfere with the first one in a way that ends with a crash.
Most game mods don't get along. Universal mods
may work. Or not. Depends.