When I right click, I see blank display, however the items are there.
Any ideas?
I have a paid version but cannot get the code as well 
It might be a graphics driver problem. Make sure they are up to date.
Try turning off the option for shadows under menus, under Preferences / Toolbars.
You can get your registration number via the Licence Manager in the help menu.
yep it was gpu - thanks mate!