SynthV VST has disapeared from my plugins

I was using SynthV in Cubase 6 without any problems. I had opened it as a track in a project, and connected it using the code from the standalone version. I was working fine, but I closed Cubase & restarted my computer, and after that SynthV was no longer in my Cubase VST list.
I’ve tried re-scanning the VST folders, but it still doesn’t appear. I’ve tried uninstalling & re-installing SynthV, but that didn’t help either. Does anyone have any idea what the problem is please?