You are right the page has a problem. I copy my post here:FIXED NOW
New gimgunlock-0.03+MapSigPatch - Windows version Latest release
As usual drag&drop the img in it to unlock it.
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)c (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 downgrade its 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)
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.
This post requires you to click the "LIKE this post" button and hit F5 to read this content.
Some automotive units [eg nuvi 55/56/66/66 with latest issued fw, & others] can also use the following workaround for NTU maps described in the [Only registered and activated users can see links. ] below. But don't share outside this forum, read the warning in it:
Now you can use [Only registered and activated users can see links. ] to unlock your firmware and use unlocked maps!