This request is 18 months old, but with Kontakt 8 around the corner it is more relevant than ever.
VSL folks, could you respond if this is something on your roadmap? It would be of HUGE benefit if users could have their versions of Kontakt (or any other plugin) use the latest version automatically. This is now supported by Cubase, Nuendo and Logic
https://steinbergmedia.github.io/vst3_doc/base/classSteinberg_1_1IPluginCompatibility.html