richardson - what do you mean "double-clicking on your runtime" ... do you mean in the library palette ?

Yes. Double click all your runtimes  and then open and highltght the one you want Poser to open to.  (Set your rendersettings, scripts, binary morph, Natroom,animation settings,,, all of it..) Then set prefs.  I'm sure you know this. This may not help but "shallow" search may save your sanity..

Some people have zero problems with P7....  Mine is just bearable.