Thanks to IBM Support:
To disable the Guided Tours, perform the following steps:
1) Log in to Connections as a user that is mapped to the Admin role for
the Common application.
2) Navigate to URL
3) Set these three parameters to false:
4) Access Connections using a browser with a clean cache and verify that
the popups no longer appear.
This /connections/config looks like an interresting url for the future…..