The latest stable version of CIS (Comodo Internet Security Premium) is 22.214.171.12412 and it is the version that you have installed. You can download the online setup from the link you provided 1000 standalone/cispremium_only_installer.exe. However, there is no offline setup available for download on the official website.
Please note that CIS is no longer actively developed and supported by Comodo. It is recommended that you migrate to a different antivirus solution, such as Comodo Antivirus or Comodo Internet Security Advanced.
You are correct with the latest ’ stable ’ version but you are not correct in there being no developement by COMODO. A beta version has been released recently and another beta is due to be released soon :-