Thanks but I already knew that and it isn't what I was looking for. This process is extremely slow if you want to change multiple associations, and it doesn't allow one to see what is associated to what. And it doesn't work for folders.
Edit: I found /.local/share/applications/mimeapps.list and /usr/share/applications/defaults.list
Custom build w/ Gigabyte Z87MX-D3h | Intel Core i5 4670 | 8GB DD3 | 250GB SSD