Win: Change to using EdgeUpdate registry key instead of BLBeacon. The BLBeacon registry key does not seem to update the version immediately after receiving an Edge update, only after actually running Edge. The EdgeUpdate key seems to be updated immediately, so use that instead so our juntion doesn't point to a missing directory.

[Desktop Entry]
Name=Dynamic Windows Test
Exec=@prefix@/bin/dwtest 
Terminal=false
MultipleArgs=false
Type=Application
Categories=Application;Development;X-Red-Hat-Base;