It unlocks NT (not NTU) IMGs in some 2014 devices, but not working with all new devices 2xx9 and probably in most of newer devices firmware */** read note #5
If you have 2xx7 (8) (PartNumber> 006-B1582-00), works
If you have 2xx7 (8) (PartNumber> 006-B2077-00), doesn't work.
*NOTE 1: If you updated a 2014 device firmware recently and maps stopped working the only one solution is to downgradeits firmware (if available), because these new devices/firmware have improved checks, NT maps to work must necessarily contain a valid digital signature. (if removed by new gimgunlock+mapsigpatch map wont work)
To rollback see here
Maps created by MPC with invalid license won't work in these devices.
In zūmo590, GPSMAP64, Edge1000, NT maps unlocked by New gimgunlock-0.03+MapSigPatch will work, Maps with Unicode codepage (65001) won't work.
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* Direct Modification - unlike other tools which use GMapTool to split an image file, unlock each tile, then join all tiles; this tool unlocks all tiles in an image file directly without splitting and joining. Therefore, you should back up your original map first before running this tool.
* Super fast speed - The 1st result of direct modification is super fast unlocking. For example, a 2.3 GB image file can be unlocked in less than 4 seconds.
* Zero disk space - The 2nd result of direct modification is that no intermediate disk space is required. In fact, you can unlock a big image file on a SD card or USB connected GPS device directly and quickly.
* Intact header - The 3rd result of direct modification is that the original header of the image file is preserverd. Thus, timestamps, version number, Mapset name, etc. remain the same.
* Less memory used - this tools runs happily on Win32 without the need of 3GB switch.
* Multi-platforms support - this tool is distributed with Windows binaries. But those who prefer to run on Mac or Linux platform can compile the source code by themselves.
* Ease of use -
to unlock, simply drag the image file over the icon of gimgunlock.exe,
the dragged file will become unlocked. That's all. You can also run it in a command prompt window or batch file by supplying the pathname of the image file as the only argument.
gimgunlock.exe