Try again from c:\garmincure3\ (you have a very deep directory structure)
Delete the temp folder and the rgn file
Open Garmincure3 as administrator
Drag the gcd file into garmincure3
Select cure
Press Make Firmware
Press Updater.exe
Get your device into pre-boot mode
Select USB and flash.
(Remember Cure is not bootable, It's just used for access to the internal Storage, Later you have to flash again in original mode)
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