The CMLess Trados Studio 18.104.22.168 plugin is available at Trados private Appstore. Users can set up Private Appstore, refer this article.
If you are unable to find the plugin at the Private AppStore, it can be downloaded from https://appstore.rws.com/plugin/119/, select 22.214.171.124 version for Trados Studio 2022.
The Release Notes are available from “change log” link.
The files are stored on Dropbox by RWS so check with your IT if you cannot access them.