You can uninstall or removes an installed molly-guard package itself from Ubuntu 14.04 LTS (Trusty Tahr) through the terminal,
$ sudo apt-get remove molly-guard
If you would like to remove molly-guard and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove molly-guard
If you use with purge options to molly-guard package all the configuration and dependent packages will be removed.
$ sudo apt-get purge molly-guard
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove molly-guard