help with severe install problem

I was attempting to install the new entrenchment beat. The download went fine, but the instalation had an error and i was forced to uninstall what had already been installed. When i did unistall, my vinilla sins was also uninstalled. Impulse shows it as available instead of installed, however the program files still appear in their folder and they do not work. I cannot get any method of uninstal to work. When I try to reinstall from disk I get a fatal error.

Please help, Thank you

Edit: I managed to install vinilla sins, but now it says that my entrenchment regestration key is invalid. IT was valid before this whole mess started.