There is no difference between Kas-Kel Simplicity, Kas-Kel SimplicityPlus, and Kas-Kel ParadigmPlus. Your program / directory may be named differently depending on which installer was originally used, but each program has been automatically updated to the latest version.
What Is the Difference Between Kas-Kel Simplicity and Kas-Kel ParadigmPlus?