Post-HBC Uninstallation won't recognize LetterBomb

I followed this guide to install BootMii and HBC with LetterBomb
And later it told me to fomat my SD card. After that I tried booting BootMii via HBC I just got a black screen.
I thought I did something wrong and uninstalled HBC. Now I'm retrying to install HBC via LetterBomb, except it doesn't recognize it anymore. (I don't see a Letterbomb in the mail section.)

Try re-downloading Letterbomb and make sure you have selected the correct MAC address and region. In order for BootMii to run you need certain files on your SD card (armboot.bin and ppcboot.elf) which you can get by running the HackMii Installer and selecting "Prepare SD card".

I'm having the same issue. Maybe letterbomb is a one time only thing. I've been meaning to try some of the other exploits but haven't been too motivated lately.

But yeah I triple checked everything and tried a few times on different days but no dice.

It's not a one time only thing, you guys are just doing something wrong.