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.

In Ubuntu MATE 16.04 LTS as in other Ubuntu flavors you can install the following software managers:

• Synaptic (sudo apt-get install synaptic apt-xapian-index);
• Muon (sudo apt-get install muon);
• Ubuntu Software Center (sudo apt-get install software-center);
• Aptitude (sudo apt-get install aptitude). /

  sudo aptitude

All these programs allow to search, list, install and uninstall (like appwiz.cpl in MS Windows) programs.