1> Open the Ubuntu Software Center by clicking on the Ubuntu Software icon in the Activities overview or by searching for Ubuntu Software in the search bar
2> Once the Ubuntu Software Center is open click on the Installed tab to view a list of all the programs installed on your system
3> Find the program you want to uninstall and click on it to open its details page.
4> On the details page you should see an Uninstall button. Click on it to start the uninstall