Hi Kane,
The file restrictions are found within the database itself, you can find these
under the table called 'UploadedFileRestrictions'
When you query the table you should see something similar to the below screen shot, when allowing a new file type, you must set the 'strContentType' to match the file type you are allowing, this is better know as a mime type.
If you are unsure of the mime type this is a great reference to most known mime types http://www.webmaster-toolkit.com/mime-types.shtml


When making any changes to the database Elcom highly recommend that a DBA perform all necessary changes, and the database is backed up prior to performing any changes.