In X3, I could save, shutdown and whatever my SONAR window state was would be restored next session.
I use 3 monitors and this was true of whatever I had displayed on all 3 monitors .
Platinum does not seem to have the same behavior. On restart, the multidock would consistently dock under the track view.
I found that if I locked the current screenset (for me #1) then shutdown, the multidock would keep its undocked status and also come back in the proper position on restart.
Of course, if you want to change anything you have to unlock, then re-lock the screenset. This is a PITA vs X3.
So Beagle, try locking the current screenset when you save and close the project. If you changed anything with the windows, unlock, re-lock then save and shutdown.
AD2 if visible on save/shutdown does not re-appear on restart and when opened again wants to appear halfway off the right screen.
I need to look at the AD2 issue in more detail but the screenset lock does not seem to work for AD2.