OK, for the heck of it, I just did a conversion of a very old V3 hair to Dawn, and yes, I needed to do a Partial, because this hair had every body part V3 had. I don't know what possessed the creator to do that, but maybe that's how they did conforming hair back in the day. It also could use some updated textures, that's for sure.
When I tried to Quit HCS Pro, however, I was given the following popup dialog, and it must be something in your coding, because I don't have my Runtime on my D:\ drive, and I was doing this conversion in P9, not PP11:
Traceback (most recent call last):
File "D:\Poser\Poser 11\Runtime\Python\poserScripts\Netherworks\HCS Pro\_nwsHCS.py", line 2088, in NWS_Quit
File "D:\Poser\Poser 11\Runtime\Python\poserScripts\Netherworks\HCS Pro\_nwsHCS.py", line 2094, in NWS_CloseApp
File "D:\Poser\Poser 11\Runtime\Python\poserScripts\Netherworks\HCS Pro\_nwsHCS.py", line 2161, in NWS_SaveConfig
AttributeError: 'NWS_HCS_Main' object has no attribute 'vDestPropPath'
Also, HCS Pro won't "Quit", it just keeps repeating this info in the dialog box, so I had to close the scene and Poser.