I have checked all locations for VSTs and all but kontakt 6 which is now called Kontakt are being recognized in Studio one 4.
Studio one 4 Pro is up to date andI have a new install of Komplete Ultimate Collectors' Edition.
I have rechecked that the locations for instatlling Konplete Ultimate are correct and that they appear in the correct location.
I have uninstalled and reinstalled Kontakt.twice.
I have deleted and reprogrammed the VST locations in Studio One and also refreshed the instruments in the browser.
Every other VST is seen in the browser from the same VST location that holds the kontakt dll.