AnswerYes, you can manually add extensions which are not listed in the application by default.
For example, to block a *.mp4 file just type mp4 in the File type: field. This will not be a real file type filter, meaning if a user renames the file extension, it will not be blocked.
A list of supported real file type filters can be found below:
As of EndPointSecurity 2013 Service Release 1 (build 20130719), support for the following archive types has been included:
More information on how to configure a file-type filter can be found in the manual here.