hi Neil I tried using Garmin express & web updater too for the GCD firmwares for Nuvi 42/52lm it seemed to look like it worked when I saw the firmware installing only to fail & look like the Garmin Nuvi 40/50 series GUI. instead of the 42/52LM
my mistake was to flash the 40/50.GCD/.RGN files which I followed instructions on Garmin's website
the updater.exe sees my device as a 40/50 series instead of 42/52lm which is identified in Garmin express.
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I noticed when I get the US/ .GCD firmwares using Garmin web updater & follow the preview link before installing it takes me to Garmin website showing Garmin Nuvi 40/50.GCD files instead of 42/52LM which is either x2 & x4.GCD ver4.00 Or Nuvi 42_52 SGMY.GCD / Nuvi 42and 52_GCDFile_340.GCD
which I've been downloading & flashing with web updater since I can't convert them to .rgn files successfully with out it giving errors as shown in the screenshots above
I feel the features differ because the 42/52lm had more options in the settings & split multitasking abilities plus a newer OS feeling like windows 8 compared to XP
OK the device is made in Taiwan but it's the USA version bought it in Boston
007-002276-00 Rev C 170-01202-00 from the box
m/n nuvi 42
serial code: [removed]
I need a walkthrough with .GCD-.RGN converter tool to revert it successfully to the right firmware which I'm willing to learn if anyone is kind enough to give me directions that's where my challenge is.