The Help selection in both the Workstation and Webstart will actually show up is this: [] in the browser page.
Thie issue is from a past links that now has been changed from CA to Broadcom.com
APM 10.5 Workstation, Webstart and Webview
Update a parameter in the IntroscopeEnterprieseManager.properties file.
From:
com.wily.introscope.help.url=https://docops.ca.com/rest/ca/product/latest/topic?hid=HID_BLUE_BOX_PAGE&space=APMDEVOPS104&language={LANGUAGE}&format=rendered
To:
com.wily.introscope.help.url=https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/it-operations-management/application-performance-management/10-5.html
Stop and restart the EM and new link will be associated with the Menu option.