I don't know how or when but RSD had saved all my .rsd files in C:\Program Files\CoffeeCup Software\Responsive Site Designer.

I have a site I use as a template. Opened it and tried to save as and overwrite another .rsd that was in the same folder as above. No errors or messages. Except it doesn't save.

When I tried to save as a totally new .rsd file I was informed I didn't have permission to save here.

Just to let you know there is no warning or error when it can't overwrite a file in that folder. I'm using the latest version and build.

Sometimes the save isn't available just save as, but just once in a while.