Uninstalling Beta wreckes Rhino 6 how to repair?

Yesterday I uninstalled win7 Beta but today 6 won’t start.
Does someone know how can I repair this?

Try repairing the Rhino 6 install:

Start Menu > Settings > Apps > Rhino 6 > Modify > Repair

Thanks, it seems to work although I had to registrer my licence again and after done so, there was a message about a certain periode expired.

Sorry for my bad english, it is not my native.