Internal Update Utility?

[jPress05]

Is your feature request related to a problem? Please describe.
I find it annoying when I have to update Twighlight. E.g. If there is a bug, the only way to fix it is to go through the whole process again... in reverse.

Describe the solution you'd like
Internal "version manager"/update utility. Potentially connecting using built in DSi WiFi?
At least the ability to store a back up of version/settings as a .7z and be able to roll back in case something goes wrong.

Describe alternatives you've considered
Considered maybe an approach that utilises FTP however this is slow. Considered the idea that a flashcard could be used as a "backup drive". If TWL is launched from flashcart, then the user could be able to save data from the main SD to the flashcart?

Additional context
Context is that the SD error was driving mad. I installed TWL. Updated it within a few days. Then reverted after a day. Then finally updated again.