@osiris3
Here's a step by step. I'm gonna start from the very beginning so anyone looking at this can do it.
It only works for people you are subscribed to.
Go to any OF page and click on the lightning bolt in the circle, in your extension bar.
Click "select user" and find the person you want to download
When the next bit becomes visible, you can pick and choose what and when you want to find stuff from. I always do "everything until today".
click the spy glass.
wait until it finds what you asked for
when it's done searching, you can choose either Photos or Videos, by ticking the box or ticking both if you like
now select XTRACT SELECTED
don't leave the page until it's done downloading
do the same again but check to see if they have archived stuff and get that if you are interested