How did you reset to default?
Assuming that you didn’t hold the shift key when applying the FX, that should have reset the window positions.
Try hitting Alt/D/1 to get back to the default window poositions.
You could also try temporarily resetting your screen resoultion higher to see more of the desktop where your window may be hiding.
Gary Kleiner
Learn Vegas and DVD Architect
http://www.VegasTrainingAndTools.com