I've reached level five in everything
If I want to re-complete every lesson in the tree, do I have to delete the entire course? Also, does clicking the dumb-bell icon cause a lesson to be selected at random?
Would working from your duome page do what you want? All the skills should be available, and there are Practice (dumbbell) links on the right of each line, too.
Going through a tree for a second time, I like to work hard on "reflexes" with Timed Practice, which is also accessible through the dumbbell links, once you've bought it in the Duo store. Give that a try. You may like it.
Delete/reset your course.
I suggest you create a new account. Also, try doing the "test out" instead of starting with the basics...
Is there a course from Swedish to English? Or did I mistake this suggestion. :0