I could ask you questions about how many monitors you have, is window >> application frame checked. But resetting your prefs should resolve this.
Reset your preferences. Hold your fingers over SHIFT CTRL ALT, boot illustrator, hold those keys down as quickly as you can after clicking for about 3 seconds.
dual monitors. And i'm on windows so the application frame cannot be toggled.
I was able to fix it. Detached the application and then resized the scrunched window. that seems to have done the trick. Weird since I had never squeezed it all the way down like that.
thanks! Didn't know about the preferences reset.