So my city lost power while I was playing, and now URW won't boot. It shows up on the taskbar, but there is no window or instance running anywhere
Do I have to reinstall or something?
Problem is due to winpos.dat file being set to 0,0,0,0 (saves your screen co-ordinates and width/height)
if you delete:
C:\Program Files (x86)\Steam\steamapps\common\UnRealWorld\winpos.dat
should fix itself when you run it again. otherwise just do an integrity check/reinstall as privateer suggested.