Cannot upgrade firmware

[Woliwon]

Awesome! Smart idea; good solve.

[Breug]

Connected printer to another network and then update went smoothly

[Breug]

First I tried to install bridge release 67.59.01 and failed

Another attepmt I tried to install lower version 67.31.81 and also failed 

I started update via embeded web server, it sent the file, printer rebooted and "Software upgrade failed 017-759" appear on the screen 

[Woliwon]

Are you trying to do both at the same time? 67.59.01 is a bridge release that needs to be installed before any newer versions can be installed because all newer versions are encrypted and it needs the bridge software to read the encryption

[Woliwon · Accepted solution]

017-759 Electronic signature verification error of download data.

Procedure
Advise the customer to re-obtain the download data then perform the operation again.

[Breug]

Current installed version is 67.3.71

I've tried to installed next versions and always failed with message: "Software upgrade failed 017-759"

67.59.01

67.31.81

How can I upgrade to a newer version?