I had some preset issues with other 32-bit plugins being bridged into a 64-bit Sonar, with regard to it forgetting settings next time I launched the given project.
I think I ended up saving the plugin settings as a preset, and then if I recall correctly it either started getting it properly loaded, OR I could load the preset I had created. I subsequently made a deliberate choice to move completely away from using any 3rd-party 32-bit plugins in any new projects in a 64-bit Sonar, and it all eventually just took care of itself, over time.
I DO have a 32-bit X3 installed, in case I have to reference one of those 32-bit plugins, but it very rarely comes up these days, for me.
Bob Bone