It's true that licensed song lessons cannot be downloaded but I just tried a half-dozen or more other lessons, old and not so old, and download seems to work fine for me.
If your problem persists I believe you'll get faster help from the Help Desk. Click on "Contact Us" at the bottom of the page.
"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
-- Chet Atkins