Quote - I tried the import script. It brings up a dialog box that tells me running the script will crash the program and asks if I want to continue. If I do, guess what happens, the program crashes.  That they even included this warning box makes me believe that they knew the script wasn't 100%

There's a big difference between killing the program (i.e. shutting it down properly) and crashing it.

The script has to close Poser once it's finished writing the new file, as the newly imported Runtimes won't be visible until after a restart and to be sure Poser won't have a chance to attempt write to the new file.

If you really wanted to, you could remove the sys.exit() call and shut Poser down yourself.