Client IDS (CIDS) is the Intrusion Protection Component in Symantec Endpoint Protection 12.1. Symantec has released an update to the CIDS component. When I check under Help>Troubleshooting the version tab does not reflect the expected version.
In SEP 12.1, you may find version information for core product components under Help>Troubleshooting. The information for CIDS is shown as "IPS" in RU1 or as "Intrusion Protection Engine" in RU2. It is pulled from the driver file, which is the *sys* (IDSvix86.sys) file that is present in the IPS definitions folder.
If that file has not been updated with the new release, the version information will remain unchanged.