Have you tried editing the reaper-vstplugins64.ini file in the Reaper resources folder?
i.e. stop reaper, take a copy of the .ini, and then delete the line for vcv, save, restart Reaper in admin mode. It might just scan the .dlls etc (I assume you have stashed all the folders and files from the distro in your own 64-bit plugin folder)
HTH (and for other Reaper users with issues?)
dB

