The 0.8.5 Vital Update was the last update to contain a VitalFX vst, and it still works. By setting my internal date and time to before the beta expired, I was able to get it to run:
Modulation works, audio passes through and gets processed, just stay away from the transpose box, that crashes everything.
In terms of stability, it’s decent, I haven’t explored it fully yet so I can’t give a better analysis. If you really want a VitalFX, this is it for now.