I made ns4decode for my own use. I don't plan to develop it any further, because it already does everything I need. I would like to fix anything that doesn't work as intended, though, so you may report bugs by sending a polite email to ns4decode@gmail.com with enough information to help me reproduce the problem. I might not always check this email often, so please be patient. Thanks!
The revision history lists any bugs that have already been fixed.
ns4decode was developed based on version 3.13 of the Nord Stage 4 Program file format, so its outputs for a few parameters might not be accurate when used on older versions of the Program file format. You can make the NS4 update the version of a Program by temporarily changing the value of a parameter and immediately changing it back (example: turning a layer off and then back on) and then saving the Program by pressing the Save button twice. The Program should still look and sound the same in the NS4, but the Nord Sound Manager should show the updated version number for that Program. If it shows 3.13, then ns4decode should work correctly on that Program.
Beware that version 1.42 of the Nord Stage 4 has a bug associated with morphable parameters that can cause a value to be displayed incorrectly when using the MON button. If you observe a discrepancy between the value displayed by the instrument when using the MON button and the value reported by ns4decode, try this instead: while holding a morph button (WHEEL, A.T., or CTRLPED), press and hold the MON button, and while holding both of those buttons, move the slider/knob for the parameter in question. The value displayed in the From field should agree with the value reported by ns4decode.