I use v15 and I guess it works OK.
Windows 10 is pretty safe o.s. And can be hard to corrupt.
If worried just dont allow that system on your internet when that program is running.
As for support I have little idea what that is. I report stuff all the time and for many years to sprutcam America " Tormach" does little or nothing.
I have reported lathe problems for over a year now and not one has been addressed. I even offered to help them fix it and nothing.
I gave up and just use or work around problems as I have done for many years.