How do I renew my priviledges? Do I simply schedule a biannual and it's all good again

Yep. (Assuming it's the US). If you haven't flown in a couple of
years, you may be rusty, and the biennial may take longer than normal.
(Biennial is the word, not biannual, but it's no longer called that.
It's just called a "flight review".

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.