How to uninstall programs in Ubuntu Mate 16.04?

I want to uninstall some programs in Ubuntu Mate 16.04.

I have searched for answers but they often say "use Synaptic" or "use the Software Centre" but I don't have either of these. I only have - rather confusingly I might add - Software Boutique, Software Updater, and Software & Updates.

Sometimes they also say "right click the program from the menu" but that doesn't give an uninstall option. I just want to see a list of installed programs and click "uninstall" or something similar.

Aptitude is a nice text based package manager that will resolve dependencies. It lists installed, not installed, upgradeable, etc. Among other features, it has a search and dependency resolver.

If you don't have it open a terminal and run:

sudo apt-get install aptitude

It can be issued command via command line, but to launch the interface open a terminal and run:

sudo aptitude

You can use command line and introduce these commands:

sudo apt-get remove <program name>
sudo apt-get purge <program name>

First (apt-get remove) will remove program, but save its configuration files (usually in /etc); but the second (apt-get purge) will remove program with its configuration files.