Starting with product releases for SAP2000 v18, CSiBridge 2016, ETABS 2016, SAFE 2016 and later, users must are required to install Sentinel RMS License Manager v8.6 (or later) to host these licenses. Older versions of the Sentinel RMS License Manager will not recognize these new licenses.
If you currently have License Manager v8.5 (or earlier to v8.0) installed: The CSI Installation Wizard will prompt you to manually uninstall your current License Manager version before it proceeds to install License Manager v8.6.
...