When will the demo for the download directory work again? I would like to test of the front end and back end before proceeding and to see if it meets my needs.

As stated in other topics the Demo site is not available at the moment because it requires a lot of work (including how to let you see the backend without breaking the website). Hopefully I can release it quite soon. If you have specific features that you'd like to test let me know it, or questions about what it can do.

Are you only allowed to use local files or can use external files like ones you upload to a filehost? Can you have a download with multiple download links / mirrors?

Kind of like what these guys are doing on how the have multiple download links which link to a external site called zippyshare.

http://animestash.info/anime/show/4392

Yes, you can have all you need.

So I'm able to do it like the people at AnimeStash?
For local files am I able to limit download speed and how many downloads they can have going at one time? Example: For guests/unregistered users 1 download, registered members 2 downloads, etc. Once they finish downloading their file, they can start downloading a new file.

Do you guys offer any temporary licenses, like ones that expire after a few days so that the product can be tested since the demo is down.

Unsure if you noticed but your screenshots are like small. Unable to click on them to bring up a bigger size.

Limit parallels and set download limits are planned for 2.0 and code has been already written for it.