Cubase 8.5 won't open after downloading iLok Manager

I downloaded the Hellraiser JST plugin, which required me to download the iLok manager. My license is immediately visible, and appears activated. Now, Cubase quits on the screen “Initializing: WaveShell1-VST3 10.0.vst3”. I’m sure it’s something simple, but I’m not sure what I’m missing :confused: