Running Studio One 4.6.1 on an iMac Pro running Catalina. (But saw the same problem on my old Mac Pro running El Capitan).
On many, but not all, effects, the same vendor folder is displayed twice, and in each folder is a duplicate copy of the same effect. In some folders, (iZotope, for example), there are even duplicates of the effect in the same folder, so I have Neutron 3 Elements listed 3 times.)
Why is that, and is there a way to hide the duplicate vendor folder, (I know I can hide the effects listed in the folder, but apparently not the vendor folder).