First of all, WDM is EOL.
Second, WDM Standard was free of charge. So it looks like you’ve tried to install the Enterprise version.
And lastly, to update doubelnd C-class devices you only need a ftp server. Nothing more.
How do you know that the client recognizes it?
How does your wnos.ini (if you have one) look like on the ftp server?
Post a screenshot of
– ThinOS – Central configuration – Fileserver
– Windows Explorer – “your folder structure where the firmware file is stored”