I opened a midifile yesterday and by default Sonar X2 opened up. I've been using X3 now for sometime. So today I opened up X3 to listen to a project and got a window ... Missing Plug-Ins. "They are referred to by this project but could not be found. They may be missing or improperly installed".  Missing plug-ins showing were addictive drums, th2, breverb 2 and studio mark 2. All of these I have and used on the projects. Not sure how to fix this problem. Any suggestions pls?

Problem solved. I was using X2 as the default program to open a midifile (set a year ago). When I tried resetting the midifile extention to X3 today it defaulted my plug-ins back to X3. So...nevermind ...