The problem is your on a mac.
Mac user here:
ShadowZero is technically correct.
Something in caching on the mac causes it forget up permissions and not allow it to write to the folder. If I were badspot, I would remove it all together since obviously it doesn't work correctly.
Although mine, (half) works.
I get the sqlite errors, but I just click Ok and it continues downloading as normal and nothing wrong happens.
*shrug*