frkfir
scook
If VST3 support is available, there would be VST3 migration settings in Preferences > File > VST Sesttings.
I can see there a path to: Preogram files --> common files --> vst3
But actually, I cant find any folder like this on my computer.
The VST3 migration settings, if any, are in SONAR preferences. It is entirely possible to have VST3 plug-ins installed and still not have a host which supports VST3 plug-ins.
All of this is only marginally related to the question about Region FX though.