**Before you do upgrade make sure you're wired
**Wireless connections MAY fail leaving APEX with no software
Download the firmware from Neptune, http://www.neptunesys.com/apex_4_05.zip
Unzip.
Run the Apex flash utility
Fill in all fields, defaults are auto filled in there but if you changed the password or port you will need to change them in the software.
Update firmware.
Update web pages.
Log into controller and verify new firmware, Configuration -> Network Setup (on bottom)
Update all modules, Configuration -> Module Setup
Choose each module from the pull down, select the upgrade firmware button and submit.