The error I'm getting is:
Unable to start debugging. The Silverlight Developer Runtime is not installed. Please install a matching version.
The error I'm getting is:
Unable to start debugging. The Silverlight Developer Runtime is not installed. Please install a matching version.
It depends what version you want - if you want v4 then silverlight.net/getstarted/ has a couple of download links. If you want v3 or before then you may have to ask on the forums.
EDIT: The link is currently titled "windows developer runtime"