I've never used AppZapper, and maybe it's more effective, but you can also download freeware Easyfind.
http://www.devon-technologies.com/products/freeware/index.html
I learned about this from BDAqua - thanks again - who brought up all the shortcomings of Spotlight. I use it all the time as a general search tool and to uninstall applications (you can delete files directly from it); it will find things Spotlight will never see. It's pretty thorough. Toggle it to scan for all files, using the "light switch" at bottom left, and set it to include invisible files. The trick for getting it to display all related application files is to enter every possible name an application might be using with a file, i.e. the name of the application specifically and, perhaps, the company name, anything related you can think of.
Message was edited by: WZZZ