How do I configure the "input format" for the File Tree module? My question is in the input format step.  How do I "add File Tree to your input format?" 

Here are the instructions from the File Tree module:
"Enable the module, and add File Tree to your input format. Then, enter [filetree dir="some-directory"] into the body field of a node, and it will render a list of all the files in that folder. (Note, the folder must reside in your site's "files" folder.)"

When I go to configure the module, I'm taken to
Home » Administration » Configuration » Content authoring » Text Formats

Filtered HTML - anonymous user, authenticated user, administrator
Full HTML - administrator
Plain text - All roles may use this format.

It says "Improper text format configuration is a security risk," so I want to make sure I have this right.  What is it that I need to add where to make File Tree work, safely and securely?



I found how to set the input format to use the input filter implemented by the File Tree module:


Go to text format configuration, accessible again by Home » Administration » Configuration » Content authoring » Text Formats (or by clicking on "Configure" for the File Tree module)
Click on Full HTML.
Halfway down, there should be several check boxes, among them one for "File Tree."  Just check that box and you're set.


Now, from here, I still haven't been able to get the module to run. Despite this change, I still see [filetree dir="dirname"] printed plainly where I try to insert a file tree.

(This video helped me: http://www.youtube.com/watch?v=ASKqit7kDak.)
If you want to get File Tree to work, after you set up the input filter, the directory you are referring in [filetree dir="dirname"] must be a directory contained in your site's "files" directory. If you want to display all the files in the "files" directory use [filetree dir="/"], or if you want to display a particular directory, put the files in a directory (say, dir1) under files and specify [filetree dir="/dir1"].