Level editor opens up in a very small window, how to fix the resolution??

[Hardarm]

The level editor opens up in a window that is so small i cant change the resolution back to normal.
I'm guessing this is happening because i was messing with the resolution in the options menu trying to get it to fit my screen and to make the story short, The resolution is set really small and i dont know how to change it back.
Im not able to go into file, or the options menu to change it back because the window is so small that all i can see is the border and the grayish white background just above the file menu.
ive seen on one thread how someone changed the resolution in the .cfg file but i dont know where to find it and what to change.

Open the editor suite archive and remove every file that has the same name of the files into the suite. (watch out, don't delete game files!) then, put the editor suite as you did the first time you got it, and i think it'll be back to normal.

I hope it helps!