As mentioned in this post, there is a bug in MDB <= 0.0.7 that inhibits downloading of files larger than your output buffer’s size (usually 128M), which makes file downloads particularly useless in an app like this that was originally designed to archive tv/anime show episodes that are usually over that size.  I don’t foresee my schedule letting me get much work done on MDB so as I promised, I’ve released a new version of MDB with that fixed.  Get it on the mdb page.