Scaler 2.8 install

I installed scaler 2.8 update and the installer installed the VST 2. But VST 3 and AU re not there in Studio one. Any ideas?

Further to this, I noticed that in my 2.7 instrument I had hidden all but vst3. Scaler audio the same. Thinking that visibility may (long shot) have something to do with it. I made them all visible. And ran the installer again. No luck. The 2.8 vst2 plugin shows up and all the 2.7’s show up. Dang! It’s not a system security issue. Just cannot figure out why vst 2 would install but not AU or Vst3.