If you're referring to the GarminDevice.xml file it doesn't matter what you alter/edit in it, the unit always writes the correct info to it as soon as it reboots. My earlier reference about changing the HWID and software version in the xml file was to obtain Asian related files and if you re-read my post #50 you'll see it says not to let it reboot first. Have a look at the xml now and after you flash it again and you'll see. Only the Garmin helper software programs like GE, WU & MU will read the xml and the device itself only writes to it.

To flash back to US/EU, just do the same as what you did to flash to SG/MY. This time, remove your existing Asian-related ExtData, Help, RemoteSW etc and replace them with the US files/folders which you should still have in the folder 'US_files' as per post #32. Backup region 41 again and hard reset of course, do both of them before and after flashing.