Can't uninstall/reinstall

I'm trying to do a reinstall of SONAR X1 Expanded.  When I go to uninstall first I get an error message that reads:  File "C:\ProgramFiles\Cakewalk\SONARX1Producer\unins000.dat" does not exist.  Cannot uninstall. 
 
The same thing happens when I go to Control Panel-Add/Remove Programs to try to uninstall. 
 
Then if I try to install SONAR Expanded X1e without uninstalling, I get an error message that reads:  Cannot locate the required version of the program on this system.  Please install the correct version of the program to use this patch.
 
I don't get it.  I have SONAR Expanded X1d, build number 535 on my computer.  Why am I having these issues?

Thanks Bristol.  My Cakewalk Content folder is empty for some reason, so there's no loops, etc. to drag from the media browser.  I was going to reinstall in an effort to get that stuff back. 

Thanks for your input, CJ.  Yeah, that's what I thought, too.  But when I tried it, by either uninstalling first or not uninstalling first, I ran into the error messages in my original post.  It might be that I used the wrong order, as Bristol suggested.  I spoke with tech support on the phone yesterday and told them what my issue is with the missing content, and they recommended I do a full reinstall.  So I'm in the process of doing that.  Maybe it'll be a good thing in that it'll solve another problem or two. 

Thanks, bro!  I did the full reinstall with the registry key deletions as directed by Cakewalk and so far everything seems to be working well now.