Hello, sorry my bad english and thanks you for your response.
I constructed a ebike with two MP4, front and rear, which came configured from the factory for work at 60km/h with 48v.
By a mechanical problem, I had to change the rear controller, but this came configured to 45km/h.
When I try to modify the configuration using the software downloaded from the web, I press "Download" button to complete and save the configuration, but this does not happen.
Please can you help me with this problem.
Best regards,
L.