I downloaded and installed Dolphin Emulator today (Dec 29, 2017) and I do not see the option to autiomatically extract the NAND files (Tools > Import BootMii NAND Backup). I am currently running Ubuntu 16.04 and did not see the exact version number in the about section or on the page. I also checked in Windows and did not see it (version 5.0-5-XX). I could boot into Windows and use the NAND Tools but this seems much easier. Perhaps I'm missing something obvious but I don't see the option there. Thanks!
https://dolphin-emu.org/docs/guides/nand...NAND_files
https://dolphin-emu.org/docs/guides/nand...NAND_files