This release consists of fixes to several bugs reported on version 1.4. Upgrading is recommended and is risk free as no database changes are performed.
You can upgrade through your OpenGoo's upgrade section or by downloading OpenGoo 1.4.1 and following instructions on the readme file.
Download OpenGoo 1.4.1: http://downloads.sourceforge.net/opengoo/opengoo_1.4.1.zip
Contact us at the OpenGoo forums: http://forums.opengoo.org