Version 0.201 is broken, use this instead, details later:

Download:
http://turnip-town.googlecode.com/files/setup_gw_0202.exe (run the .exe to install)
or
http://turnip-town.googlecode.com/files/gw_0202.zip (unzip it somewhere and run gw.exe)

NOTE: EXPECT ANOTHER NEW VERSION (0.203) WITHIN A COUPLE DAYS

Update: if you're using 0.190 (0.191) things should work again (the problem with the Flash widgets on GrooveShark.com has been fixed).