Can't thumbnail preview 3DM files since installing V6

Since installing V6, can’t see the content of a 3DM file in a window browser, as it was with V5.
Tried the Repair option in windows control panel, while Rhino is repairing i get this Open file, window and cannot proceed…

Help ??

Bootstrapper.exe is the executable that is run when you install Rhino V6 using an off-line installation package.
I’d recommend downloading the full installer from the Rhino Download page and just run it.
That will do the same repair you’re looking for.

Tnx @John_Brock that worked & Repair did fix those thumbnails.