Sorry. I haven't found a resolution button... If there is one, let me know, or tell me how to change it. If not, then I need one NOW.
Tools->Options->Video->Resolution. Note that we have nothing to do with the core programming, that's Ultrastar Deluxe (http://ultrastardx.sourceforge.net/). We just added the skins and songs.
Well, do you know how to put it in window mode? Or can you consult me to someone else that does know?
Tools->Options->Video->Fullscreen->Off. ^.^