Hi Aoktar,
c4doctane R15 1.00RC2 test2 + Windows8.1 Pro x64 = still crashing on startup for me, as previous versions of plugin.

Hi Architect3D
You are not alone;) I can confirm all these symptoms for windows 8.1 x64 + R15 too: crash at start(official plugin 0.99f or RC1,RC2), no bugreport log, useless clean install of any geforce driver.
But standalone version works like a charm(activated, rendering).
There is temporary ...