@hcch
Your 3590 needs to use the modified files of course, and FID 800 used in Jetmouse.

You must then save the generated code in Notepad as <same_file_name_as_image>.unl. Simply open Notepad and then copy/paste the JM code without spaces or carriage returns into it. Select File>Save As, then from the dropdown "Save as type" select "All Files (*.*)" ensuring that you don't have a double extension i.e. ".txt.unl".

I'll add that info to the initial post anyway which may save further confusion although it is common knowledge.

Unlocking with an unlocker won't work either. Read Post #1 again carefully.