I'm trying to upgrade from 3.0.4 to 3.0.7, however I cannot.
The cloud upgrade feature uses passive FTP for the version.txt file, but does not for the firmware file. This fails because my hydroflash is behind a firewall and cannot accept inbound ftp data TCP connections.
I also downloaded the firmware from the cloud FTP server and using the upgrade from file feature, but that gives a "Error uploading image file (-1)" error.
Please allow uploading via download (non-cloud), and/or fix the cloud upgrade to use HTTP or PASV FTP.