reinstall patch, run dim pro as admin, open x2a, re initialise vst plugs, rescan vst plugs, open a project.... in that order. Thats basically what the instructions say to do and it worked for me.
If that dont work, repeat but from a system restore point prior to the first installation of x2a. In fact you may be better off trying this first.
If that dont work i really dont know mate sorry.