Ok so in my hast to free up space to get ready for the new Platinum, I uninstalled X2.  I run X3, but X2 was just taking up space.
 
A song uses the SI Piano which will not load properly now.  Can I reinstall just the vsts from one of the 4 original setup files for X3?  Or is there an easy way to reinstall that vst to get it working again? 

run an advanced install of one of your versions of SONAR and select the plug-in.

There were 4 separate downloads for X3 any idea which one would be the vsts? 

The entire installer must be unpacked before the advanced install option is available. You will need all the parts of the SONAR installer downloaded before you can run the installer.

Got it thanks.
 

Can we get a list of what's coming and what's going so we don't accidentally uninstall something that we depend on?
When I installed X2, I removed X1 and found that I was missing useful plugins. When I installed X3, I kept X2 and didn't lose anything but if I get a new box or if my HD crashes, I have to install several earlier versions for projects that might depend on plugins that have been removed. Until reading this thread, I had no idea that SI Piano was gone, no problem, I didn't have any projects that depend on it, but still.
Obviously, my preference is that the current version would have all the stuff the previous version had, but with 3rdParty licensing agreements etc, there will always be thrash unless Cakewalk provides it's own set of stock plugins. As it is, I'm paranoid to uninstall anything or use any of the 3rd party bundled plugins.
Even a simple text file with 2 categories: added and dropped, would be useful.