I'm impressed, it fixes 10055, the Sonivox loop mode bug. Not mentioned in the fix list, but I just tested it.
I suspect that the problem is really with the Sonivox instruments, not Mixcraft, but I'm happy that I can use my cheap but good-sounding strings again whatever the case.
3.4 GHz i7-3770, 16G RAM, Win 10 64-bit, ATi Radeon HD 5770
2X PreSonus Firepods, Event 20/20's, Alesis Monitor Ones, Alesis Point Sevens
Mixcraft Pro Studio 8.5, Cakewalk by BandLab