Thanks guys,
I am using the x64 version of the plugins in Win 7 x64 with SPlat x64.
I am not using any bridge software in this case (although I have the full version of Jbridge installed for BIAB).
The strange thing is that I have just tried Big Bang Percussion again (both stereo and 16 out) and couldn't get it to crash??!! It crashed a lot yesterday even after a couple of reboots.
TBH I still have a whole load of Sonivox stuff to install from their Premier collection which I picked up in the Christmas sales so I am keeping my fingers crossed that they don't also give problems.
The only other oddity after installing SPlat 01.2017 is that the program icon has disappeared (it has reverted to a plain icon) and I cannot reset it. From the small amount of research that I have done so far it looks like I will have to rebuild the icon cache.
Thanks again for your replies,
ZT