Please try uninstalling Rhino.Inside Revit and reinstalling it back.
Before installing again please check you don’t have those files:
%ProgramData%\Autodesk\Revit\Addins\%RevitVersion%\RhinoInside.Revit.addin%APPDATA%\Autodesk\Revit\Addins\%RevitVersion%\RhinoInside.Revit.addin