Tyrell N6 x64 VST Won't Appear in Reaper

[mizzoth]

I have a licensed copy of Reaper 7.02 running on Windows 10.

The 64 bit Tyrell N6 plugin doesn't appear in Reaper after either a default install or a manual install. It's the same with the 64 bit VST2, 64 bit VST3, and 64 bit AAX. I've never had this problem with any other 64 bit plugins. The problem doesn't seem to have anything to do with the Tyrell preferences folder or its shortcuts.

The 32 bit versions appear without any problem, but I don't want to use them because 1) the bridged interface is inconvenient, and 2) in the 32 bit versions I can't trigger the plugin via the virtual MIDI keyboard and adjust parameters in the GUI simultaneously. Both are deal breakers.

If you've had the same problem and solved it, or if you have advice beyond "install it correctly," I'd appreciate it.