We have an IP 500 V2 which shipped with version 6.x which we want to deploy it in a 5.x SCN. When I attempt to downgrade the firmware to version 5.0.24 by repointing to the older bin files, the upgrade wizard allows me to select all the files, except the bin for the unit itself. I'm using a version of manager 8.0.18 to do the downgrade. Thanks for any suggestions.