If you get the "022-2634" when trying to access the eShop on the latest EmuNAND, try this (thanks to
@Nestar):
Warning: Spoilers inside! 1. Backup your emuNAND.
2. Backup all emuNAND files (ticket.db etc.) with rxTools.
3. Backup the content of your SD card.
4. Format emuNAND.
5. Recover your SD card content and boot rxTools in emuNAND.
6. Update to 10.3.0-28X and boot into emuNAND again.
7. Go to system settings and to NNID at the top; follow instructions.
8. Boot emuNAND and start the eShop; simply restart the 3DS if it keeps looping after the password input.
9. Once in the eShop, close it and shut down.
10. Recover your whole SD card once more. *
11. Inject emuNAND backup.
12. Inject all emuNAND file backups.
13. Start the eShop in emuNAND and it should refresh your software.
14. And now you should have emuNAND eShop access without any loss ofStreetPass/Save/Friend/etc. data.