For VST3 migration options to work, the plug-in manufacturer needs to add the appropriate code to their plug-ins Here are a couple of blog posts about the feature http://www.noelborthwick.com/2013/09/28/developer-notes-sonar-x3-vst-enhancements/ http://www.noelborthwick.com/2014/01/22/developer-notes-sonar-x3-vst3-internals/
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