I seem to be having the same problem as DeathOfTime. Though, it doesn't matter if I try a manual download or using the NMM, I still get the "An error occurred" message. I'm also using Firefox. HTTPS disabled. I can download through Explorer, but if possible I'd much rather not use it. It's probably just a browser problem, but I figure it can't hurt to ask for advice. So yeah, any advice on this? Also, I can't for the life of me figure out how to attach a screen shot. The error's basically just an empty version of the normal pop-up you get when you download something, outlined in red with "An error occurred" in red font.