Glad to have that cleared up.
The latter was me talking about the updater. A completely separate and optional homebrew app.
I'll try to be as detailed as possible:
- Luma (CFW: Custom Firmware)
- Luma Updater (A completely optional homebrew app to update your Luma CFW right from your 3DS system)
- A9LH (arm9loaderhax; A well-known, yet now obsolete exploit; Was eventually replaced by B9S)
- B9S (boot9strap; The current/latest exploit; you already have it installed and up-to-date on your system)
After taking a good look at the video you posted earlier, it seems you're running a much older and obsolete version of Luma Updater, which explains why it still won't work at all. The reason being the following and some steps you should take to make sure only the latest/up-to-date version of said homebrew app is only present on your system:
- Luma Updater was originally made by Hamcha and later on, Kaoru/KunoichiZ made a fork of the updater app.
- Hamcha's version eventually became outdated and was no longer worked on; Kaoru kept their version up-to-date and made it work on b9s.
- As seen in the text from the homebrew app on the lower screen of your system (in the video), it seems you're running Hamcha's version because it tries to look for the latest version from his github page.
- Again, Hamcha's version is outdated and only worked with a9lh. This explains why the luma updater you currently have installed refuses to work with your system, seeing as you're using b9s.
- Download the latest .cia from Kaoru's github page.
- On your 3DS: Go to System Settings > Data Management > Nintendo 3DS > Software > Luma3DS Updater > Delete
- Insert your sd card into your PC: Delete the lumaupdate.cfg file from your root and place the newly downloaded .cia file in the CIA folder of your sd card (If you already had an older version of the .cia on your sd card, make sure to overwrite and/or delete it to avoid confusion)
- Reinsert your sd card into your 3DS: Open FBI > SD > CIA > lumaupdater.cia > Install CIA
- If you installed the proper/up-to-date version of Luma Updater from Kaoru's github page, it will instead mention their github on the lower screen of your 3DS while it's loading up. Once it finishes it loading, it'll say Luma Updater v2.3 in the upper left corner of the top screen.