Under Joomla 3
Go to Extensions -> Manage -> Manage. Type 'Trombinoscope' in the search box.
The free version
Select the 'Trombinoscope Contacts' package and click on Uninstall.
The pro version
Select the component ONLY and click on Uninstall. This will remove all extensions at once. If it does not, remove them one by one.
Joomla 3.10 You may see an additional Package called 'Trombinoscope Contacts Pro'. Remove the package instead of the component (all extensions tied to the package can't be removed individually).
All remaining extensions (add-ons installed separately) can be un-installed individually.
You may not be able to remove older add-ons once Trombinoscope Contacts (free or pro) has been gone from the system. To prevent such issue, uninstall them first.
Under Joomla 4
Go to System. In the Manage section, go to Extensions.
Type 'Trombinoscope' in the search box.
The free version
Select the 'Trombinoscope Contacts' package and click on Uninstall.
The pro version
Select the 'Trombinoscope Contacts Pro' package then click on Uninstall. This will remove all extensions installed through that package. All remaining extensions (add-ons installed separately) can be un-installed individually.