Is Simplify3D on the edge of the abyss?

[curious aardvark]

Since changing my main workshop machine to windows 10 pro.
I discovered that simplify3d stores all the rpofiles in the system refistry.
WHY ??????
lol
you can export them as fff files - and that's a really good idea to create your own library of profile files.
The weird thing was that when i first installed 4.1 - it worked perfectly. profiles could be updated without the program crashing - mas it was always doing on winodw s7.
But a few months down the line - it's started crashing again.

So to update an existing profile I either have to save it with a new name, or export as fff file.
I'm seriously considering going back to 4.01.
Assuming nI can find a 64 bit version of it.

And nope - haven't run any windows updates since setting the computer up. So I know it's not that.

Actually - thinking about it, it's started crashing since I plugged the sapphire pro into the computer and updated the usb drivers. Hmm.
Okay time for an experiment lol
Plus now the sapphire is fully working. I don't need it connected to s3d any more.

nah still crashes.
maybe it's the ch1s (or whatever) usb drivers ?
Have to try uninstalling them.