In order to use the "Permutation Limits" Filter there are two additonal files that you will need.
Click on the link, then save the file to the working directory after it finishes loading to your browser.
The combo4a.txt file has some errors in it. So I wouldn't rely too heavily on the permutations that are produced by applying it for the Pick-4 Game. If someone could fix this file I'll include it in the download. The Sedertree.zip file now has these files included. These links are for those who downloaded the zip file prior to this blog entry.