Just make a new script, use this for it:
EDIT: sorry, I broke the script, hang on.
EDIT 2:
Code:
ResizeWin(Width = 0,Height = 0)
{
ÂÂWinGetPos,X,Y,W,H,A
ÂÂIf %Width% = 0
ÂÂÂÂWidth := W
ÂÂIf %Height% = 0
ÂÂÂÂHeight := H
ÂÂWinMove,A,,%X%,%Y%,%Width%,%Height%
}
#!u::ResizeWin([Width here, remove brackets],[Height here, remove brackets])
Don't edit anything except the bracket parts.
It's set to resize a window to whatever dimensions you put in, just press U while holding down the Windows and Alt keys. You won't accidently trigger it that way. Just tested it myself, works fine.
EDIT 3: MAJOR mistake on my end again, finally fixed it right.