There is an issue with installing the latest version of boast machine v3.1.

The message displayed during install is this
Error message : Invalid default value for 'author'

The problem is due to the following code in install.php
author INT(10) NOT NULL default ' ',

This should be changed to
author INT(10) NOT NULL ,

install patch for Boast Machine 3.1

*Note: Right-click and save target as / Save link as