This post is from one very pissed-off customer.
As I was working with VC, it started to give me incessant nag screens about upgrading to a new version. In order to get rid of the nag screen I downloaded and installed 5.1.6.
As soon as I tried to use it, it gave me an error saying my license would not allow me to use it. Needless to say your site used the opportunity to try to get me to purchase an upgrade.
I think you could have mentioned that before the download, but you did not. So I took the option of downgrading to a previous version.
I downloaded the install package and tried to run it, only to find that it will not install because the later (forced) download was installed. Now I find that I cannot uninstall 5.1.6 because it throws an "Error 1001... the specified service does not exist as an installed service" and then rolls back the uninstall.
So now, because your cheap salesman tactics nagged me into trying your upgrade, I am left with no working versions of a product for which I have a fully paid up license.
Fix this!