After taking back-up of the current version environment, please uninstall once and after that, set-up the environment of the latest version, and migrate the various settings from old version back-up.
 

For the detailed procedure, please refer to "Upgrade guide" of each version.
 

Also, for new function of each version, modifications, precautions, refer to release notes of

the respective versions.
 

Please obtain each document from "Download and product information" of the support site.
 

* If you are using version older than 2.0.2.3, then particular settings would be necessary. In such cases, please contact support center.