NOOB help. Was working fine, now I see two windows (ie it looks like the screeenshots due, see picture)

I dont know what I changed but for somereason all the demos and everything look like this now.

http://ift.tt/1x9OsdD

Except slightly more seperated.

What do I do? Thanks

Submitted December 23, 2014 at 08:48PM by dabaconman http://ift.tt/1rgcDrn