Unfortunately Mud’s excellent effort is a workaround, not a solution (even the plugin selection window disappears behind the “on top” window).
But for now it’s the best solution until Steinberg solves this one year old known issue 
Until Mud comes up with an edited version I hacked his original file (hope he doesn’t mind) so it will work with 7.5.
Another method is using his original file and rename your 7.5 launcher the same as the 7 launcher (Cubase7.exe).
The modified file can be found in the issue report for 7.5 here (sorry 64bit only).