I’m having the same problem.  EZDrummer 3 is never shown in the Plugin Manager even if filtered and even after a full scan.   I removed the VST2 EZDrummer2 DLL to avoid possible conflicts. I have done multiple full scans.  My blacklist is empty.

I am using non-standard VST2 and VST3 paths on my D: drive and have removed the default paths, but other plugins in those paths on D: appear just fine.

EDIT: I copied the EZD3 dll back to the default VST3 folder (C:\Program Files\Common Files\VST3) and rescanned.  Then it appeared in Stuidio One 5 plugin manager.  Because EZD3 is VST3, I hadn’t noticed before, but Studio One 5 only had recognized the VST2 versions of StudioDrummer 3 and EZBass. Then , filtering on VST3, it seems that no other VST3 DLLs were recognized that weren’t in the default VST3 directory, and VST2 versions are used instead.
Additionally I only found the EZD3 plugin by using the search function in the Instrument Browser.  Loading from there, I could then drag in into the Toontrack folder within the browser.  It did not automatically insert it into the Manufacturer folder.  It seems to be an issue with Studio One VST3 support.

Moral of the story: Studio One 5 seems not to support non-standard VST3 folder paths, and there may be a bug in the Instrument Browser.  I’ll contact them.

• The post has been modified 2 times, last modified 3 years, 9 months ago by Montie Davis.