Hello. Thank you for your replies.
I have already successfully authorized the Trilogy plug-in (indeed, the VST Scan was hanging until I launched Trilogy by itself and completed the authorization process). And Cakewalk Plug-In Manager recognizes that Trilogy is installed on the computer, and correctly identifies the .dll file and the .dll file path.
So the Trilogy is installed, authorized, and recognized by Sonar. It just doesn't show up in the list of VSTi presented in the Sonar Media Browser.
There is no instrument or name "Ruby" in the Sonar Media Browser Plug-In Instrument window.
It is not clear to me how the VSTPlugInNameFormat is helpful for this problem. From the linked doc:
"This variable specifies how VST plug-in names are formatted in the Browser, effects bin context menus, and anywhere else VST plug-in names are displayed. The values are as follows:
0 = VST Name
1 = DLL Name
2 = VST Name (DLL Name)
3 = DLL Name (VST Name)"
My problem is not that Trilogy appears with the incorrect name or format. My problem is that Trilogy does not appear at all in the Media Browser Plug-In Instrument list.