Howdy

'IF' in fact the files now have their extensions (.xxx) and windoze just isn't displaying them:

Go to the control panel, open Folder Options, click the View tab, uncheck the 'Hide extensions for known file types' setting.
This option persists through all versions of windoze, go figure.
I believe this is one of the first things I always perform after an installation.

Good Luck

Paul

PS. While you are there uncheck 'Enable Offline Files' too, painful otherwise.