6
The files are still in your cache.
There are a few ways you can fix that one is you can go to the Template Set Manager in the admin area and [Clone] all your Templates. You have to give a name to the clone to do that.
See "New template set name"
You will see what I am talking about when you are on that page. Then go to the Preferences page (Preferences Main »» General Settings) and select your new clone as "Default template set"
Your done