There isn't a screen to move/enlarge, that's the problem, the screen won't display. The tab when moused over shows the 'mini' version of the screen, but it won't open/display no matter what I do. Even the bribe of milk and cookies doesn't work.
Same has happened to me. Installed and used Vortex for the first time just a few days ago. The next day when cranking it up, the vortex logo appears, a tab at the bottom of my screen appears, but that's it, it will not actually open.