EZ Drummer 2 and Existing Projects

Hi;
I use Sonar X3 Studio.
I recently bought EZ Drummer 2 upgrade from EZ Drummer 1.  I am impressed with the program but I chose to remove it for now and go back to 1 because of problems with existing projects I made in EZD 1.
 
I bought the upgrade to not only work on new projects but also to try new some of the new features of EZD 2 to enhance the older projects I made with EZD 1.  I found when I ran the existing projects some of the other plug ins I ran became muted.  On one project some horn sounds I made with the Aria Player for Garritan Jazz & Big Band would no longer play and on another project even the SI Bass guitar (part of Sonar)  was muted.  Upon going back to EZD 1 those muted instruments again played fine.
 
There was also a linking issue.  When I opened EZ Drummer 2 I would get an error message saying something about this is an older version.  The newer version can be found at C:Program Files (86)/VSTPLUGINS.   Even though the .dll file was at that location the error message continued to come up and I could not use some of the new features of EZD 2.
 
Gave up.  Uninstalled EZD 2.  Sweetwater could not refund my money, so I'm out almost $100.00.  I'm thinking about trying again but I need some answers.  The guys at Sweetwater tried for hours to help me, even accessing my system remotely, but are baffled as well.  Anything you could suggest I would appreciate.
 
Thanks
 
John B.
 
 
 
 
 

BAPU, Thanks!
 
Could you please tell me how you do that (reset synths)?  I usually load my synths through the browser.  Would appreciate it.
 
John B.