Installation

If I wanted to change from the latest beta version to the latest stable version, will my backup beta config file still work?  (in other words - Can I restore a 1.3b13 config file to 1.233?)

While it will most likely work (as not at lot has changed in m0n0wall's configuration file format lately), you'll get a big warning on the console every time it boots.

It's probably better to start with a fresh 1.233 config and copy those things that take a lot of time to set up (firewall rules etc.) manually from the 1.3b config.xml.