I can only guess it's a cable or USB adaptor problem, I know with the wrong Bluetooth adaptor you can have test and adjustments functioning but no programming capability so I presume the same could happen with an incompatible cable/adaptor, maybe just double check your hardware against the list.Thanks for your response Kinjane.
2011 Bonnie SE. Maplist says can only be remapped via cable. Further reading suggests I should also have a "read map" tab which I can not see.
Downloaded a map from the list and extended the .hex file but can't open it in the app. Any ideas what file extension does the app need and where to find them.