All of us at my company are using the version of ReSharper that is currently available by clicking the Download button (ReSharperSetup.5.1.1751.8.msi).
We all have legitimate license keys and ReSharper has been working normally until today. Today, whenever we start Visual Studio (2008 or 2010), we are all seeing this message:
The only other versions available for download appear to be nightly builds.
Please update the normal download version so that we can develop with pleasure again :-)