RVsitebuilder now has 2 versions for website building.
If you have website built in RVsitebuilder version 5 or version 6, you can access to RVsitebuilder 6 to continue your website.
To continue your website with RVsitebuilder 5, you can switch version from RVsitebuilder 6 interface.
If you see grey screen with a new create site box, just try to create a test project when fresh access to RVsitebuilder 6 (by user), then you will see the "Switch" button.
In RVsitebuilder 7 icon, you can start a new website with it as you want.