Well, that does it. I put in an order for a legal copy of Windows this morning. The reason? So I can play with WoW UI Designer at home instead of at work...
Thanks guys.
Seriously, though, this is a truely awesome program ALREADY. I can't wait until it matures a bit. I haven't run into any problems yet since I've only played with it for a few minutes at work. I'll definitely keep you posted, though.