I have used PC Studio on my Windows 7 laptop in the past, but since I no longer see a shortcut in the Windows Start menu I've tried running it outside of AECOsim Building Designer by double-clicking on the executable. However, this results in the error message "The program can't start because AdfUndo.dll is missing from your computer. Try reinstalling the program to fix this problem". I did try reinstalling AECOsim Building Designer but that did not help, and I also found that missing file in the ..\AECOsimBuildingDesigner\mdlapps folder.
Because of the multi-discipline nature and configuration of AECOsim Building Designer vs. our legacy BIM applications, AECOsim Building Designer must first be loaded and then PC Studio lauched by choosing Building Designer > Parametric Cell Studio in order to retain a proper link to the active User and Project. This is why the standalone PC Studio shortcut was removed from the Windows Start menu and is also why directly double-clicking on the executable results in an error message.