Apple Users

Try using the Finder to navigate (or use "Goto Folder" ) to the "Applications" folder (aka /Applications) and delete the application. It should prompt you for your password and then move it to the trash.

There are other things (device drivers, startup items) that live elsewhere. E.g. these guys for the system as a whole:

/Applications/Utilities/
/Library/LaunchAgents
/Library/LaunchDaemons
/Library/Application Support
/Library/PreferencePanes
/Library/Extensions

And these guys specific to your login:
~/Library/Application Support
~/Library/LaunchAgents
~/Library/PreferencePanes

And, of course, be careful what you delete!

There's more ... but this list should get about 99% of things. Including where malware lives ...