Indeed there is... I had this exact same problem when I put GWX in... Give me a minute, I'll see if I can link you to the fix...
EDIT: This should link you to Frau Kaleun's answer in my thread. Hopefully that'll get you started on putting the map back to how you want it.
http://www.subsim.com/radioroom/show...40&postcount=5
Rob.