This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
From 1.x to 2.0¶
Simply upgrade via TER, update the TS Setup with the new Option, after opening the BE Module Matomo gets installed and you're done.
Don't forget to install EXT:piwik for automated adding of the trackingcode. → Please check your page for the trackingcode as non logged in BE user, as EXT:piwik from version 2.x won't log authenticated BE Users.