Why does Neural DSP VST not show up in Studio One 3 – Questions & Answers

I downloaded several Neural DSP versions (Archetype Nolly X, Archetype Gojira X, Archetype Cory Wong, Archetype Rabea and Mesa Boogie Mark IIC+ Suite) from the offical site and installed them on the regular path, but none of them show up in Studio One 3. 

I already checked everything: the chosen path for vst’s in S1 (C:\Program Files\Common Files\VST3), reset the blacklist, allow to check for new plugins, created a new folder and added it to the path and so on… I reinstalled it but with the same resultes. 

Does anyone have any ideas as to what the problem could be or how to fix it?