I think my standard recommendation fits everybody even without knowing the skill level of the guitarists: start at the beginning.
Start with the Fundamentals courses. If at first they are too easy, good on you! Progressing through the lessons will be a nice refresher but ultimately you'll start running into new stuff and/or teaching of skills you don't have.
If it all is a breeze then the time spend with Fundamentals won't be much and then you can charge into the different genre courses or the more specific technique lessons. Meanwhile, there's a catalog of song lessons to go through. IMO, study/practice sessions should always allot time for learning songs.
Good luck, have fun.
john
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins