If the error persists, a "clean" reinstall is usually the best bet:
is updated to the latest version, as activation issues can sometimes present as file-system errors. Are you encountering this error on , and does it happen during installation or when opening your Soundtoys 5 released! - Page 4 cannot create soundtoys version root folder at soundtoys 5
C:\VST Plugins or C:\Soundtoys."No valid root folder selected," the error message read. "Cannot create Soundtoys version root folder." Run the Soundtoys Installer
Program Files.