Exactly what version of 4 are you running and what version of Java?
Does it help if you resize the dialog larger?
Oracle IDE 18.104.22.168.84
Java(TM) Platform 1.7.0_55
Windows 7 sp1 x64
Resizing the window does not help
Let's try the nuclear option - find your app data directory, should be under Windows roaming profiles for your OS user...then delete the system403 directory.
or instead of deleting it - rename it
when it asks to import your settings from version 3.x - say 'no'
If that fixes it, then you could try bringing over your connections and other settings
Looks like that fixed it, thanks Jeff!