The ASR files for 3790 are different than those used in the original 3490.
Since you did a backup as 3790, delete everything in .System\ASR\ folder.
Connect with Webupdater and "Proceed to check for additional updates such as voice updates"
Check which language "Speech Recognition Data, xxxxxx ASR" you want to install.
If you choose english only, now in the .System\ASR\ folder you have two files named "en_US.srd" and "en_GB.srd".
Now copy in .System\ASR\ folder, the rest of the "special for the 3490" files depending if you have Europe or North America CN.
For 3760-->3490, you don't delete anything because you didin't have any ASR folder in the device.
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For the ORIGINAL 3490LMT OWNERS:
Copy ALL (all together) *xml files in the attachment in post #1 in Garmin folder, restart Nuvi and you have MP3 and Video Player ENABLED!!!!
Copy them ALL at the same time and NOT only "DeviceConfig_MP3_Enabled.xml" and "DeviceConfig_VideoPlayback_Enabled.xml", because if you just copy only those two, Bluetooth is disabled.
Works for Europe sold 3490LMT.
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