Ok, after creating the 140.bin, viewing with Roger's app, ticking the necessary function (some are not working with my nuvi 2445LM european version HWID 1371), writing the restore code into update.txt (as suggested by Neil), nothing happened after inserting the microSD and reboot. However, I tried again with gtm 25, and the nuvi detected it as a traffic receiver instead of just a power cord. Thanks guys for helping me out. And the info of SD card issues within this forum was really helpful (the microSD that I used for backing up reg 41 doesn't work with backing up reg 140.)

Wondering if the bluetooth function is "really" available for this model (after enabling the feature, the bluetooth keeps enabling and disabling itself).