Hello,
Sorry for my bad Inglish, i'm French. And sorry too if don't post in the right section.
So, as you can see on my video, just after the firmware update to magic lantern, i restart my 7D and it's still the Canon fimware...
https://www.fromsmash.com/7d-magic-lantern
First: (French subtitles available) https://youtu.be/tSa1RvkoeZU
Second: Top of page -> User Guide -> FAQ -> Usage -> First item