When a package is installed it pulls in dependencies. These dependencies are often left behind when the package is removed. graphical front end package managers for Debian like systems are not much use in this case. I would suggest using the command line. apt-get should be able to remove the unused dependencies:
Run that as a normal user and see what the output is. This will only simulate package removal not actually do anything.
You can uninstall it and reinstall it as many times as you like and it won't affect your user's configuration - as I said above.
I would strongly suggest getting used to the command line package manager - apt. muon, software-center, synaptic etc are just front ends for apt and dpkg (which are the package managers in Debian based systems).
If you remove a package which other packages depend on, you can remove half your system in the process. Again: use apt from the command line and look at the results before hitting "y".
Using apt you could have just reinstalled that particular package without breaking anything, e.g (from memory).
Code:
# apt-get reinstall --purge name_of_package_here
apt will refuse to leave the dependency tree in an inconsistent state, so if you try to remove a package which other packages depend on - and it's not an essential package - apt will remove the lot. Yes even if that's your entire desktop, X.org, browsers, etc...