you need to make sure x2's plug in manager is scanning the folder that the dll folder is in.you didnt lose,you just havent set up x2's plug in manager.
easy fix.
open sonar x1.look in your plug in manager under options.
write down all the paths you have included in your x1 scan.
open x2,go to the plug in manager in there and make sure you put the same paths you got from sonar x1 plug in manager.done fixed,back to making music again.