Downloaded the prhelp.war for Pega 7.2.1 from Pega 7 Platform Update. Installed on websphere, cleared Tempdir and restarted server. When launching help from Designer Portal the Help is still for Pega 7.1.7. Is this correct?
Thanks for pointing out the Designer Studio -> System -> Settings -> URLS. This was my issue. I pointed it to the server where prhelp.war was installed and all is good. I also changed the setting to https://pdn.pega.com/sites/pdn.pega.com/files/help_v721 and that works as well.