Please stop putting VST(i)'s into installers.
Just zip or 7zip them and let the user put the contents into the plugins folder.
Anybody who doesn't know how to put VST(i)'s manually into a plugins folder has no business being near a computer.
Installers get corrupted during transit, can transport malware, aren't even necessary, and usually end up doing wierd stuff to the registry and installing other garbage junk all over the system.
Take a tip from the portable freeware makers and make like easier.