Can someone help with 'configuration' please.

I would like to view the nav files stored on my (DV3) Tx module, but each time I try to open a selected file in Gigacontrol I get a message " Error in file. Configuration was probably only patially loaded". I used to be able to view the nav files so don't know now what I'm doing wrong

I'm sure I probably have different software and firmware versions installed on my computer, transmitter and receiver although as a radio system it all wotks fine in the air. Can someone please tell me, in simple English please as I'm no computer wiz, how to make sure I've downloaded, installed and am running compatible software and firmware.

Thanks and regards

Chessiegolf