I am testing the 1.5 beta. When I open the Explorer to test doing a restore, I get an error "Failed to load repository: Repository folder is locked by another backup proxy." I only have a single instance running, so there would be no other proxy to lock the folder. I had successfully gotten into the folder once, but then closed the explorer to tweak the bandwidth settings on the proxy. The bandwidth limit didn't seem to apply right away and our bandwidth was being chocked, so I restarted the proxy service. It's been since that restart that I've been unable to open the repository again.