Installing plugin using kontakt

[RackedBrain]

High resolution monitor. Take a look at this thread.

How to adjust the size of vst?

Many plugins aren’t resizeable - so if they don’t fit on your screen you’re kinda stuck. Report it to the plugin developer. As @Ivan mentioned, if you’re running on a high resolution monitor you could try running Cantabile in hi-res mode with per-window resolution turned off. That’ll make the plugin appear tiny, but you might be able to get to the other controls.