The UnArchiver idea worked and the firmware updater quickly installed the most current version. Thank you for the prompt assistance and diligent troubleshooting!
Next on the wish list is an update to the Kasina Basic Session Editor for the new OS update. However, since the reason I wanted to update the firmware was to try to see if the converted Procyon sessions would negate the need to keep my old device, I will likely be preoccupied for at least a little while.
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