Plugin not showing in subfolder as installed

My Plugins path is c:\VST
I installed a VSTi (RealLPC) in the subfolder c:\VST\Guitar, aside of my other guitar related plugins.
The plugin is not showing in the correct subfolder but in the root. All other pluigins are showing in the [+guitar] subfolder.

Is there a way to edit the structure somewhere in an INI file?