A few days ago, i downloaded and installed Unified Installer (FPMI) and Unified Updater and got the "JAR resources in JNLP file are not signed by same Certificate" error when i tried to launch the Designer. Then, I followed a moderated Post on this issue and respectively downloaded and added currrent plug-ins and this resolved the error. Today, the said error surfaced again so i repeated the said remedy (download/added), however, the error persists. Any help on this would be greatly appreciated.

Download the Unified Installer that is on the website right now. You may have to backup your system, uninstall and reinstall.