Script downloads txt files with dl location, current version, install argument, & registry key. Script then checks if Thunderbird installed, if not it will abort install, if installed it compares installed version to current version and updates if needed. Writes to script log if successful. Script then deletes installer and all txt files. Able to report by filtering Agent Procedure logs for $Thunderbird$=All entries regarding Thunderbird, $Audit$=All entries regarding all audit scripts, $Updated$=All entries regarding scripts that have updated any application.