No valid unsubscribe link in newsletter email

Finally got around to trying out the e-Newsletter plugin. First off, is there any kind of manual or instructions to go along with this? I couldn't find anything to explain the finer points of this plugin.

So I sent a couple of test newsletters to myself using a couple of different templates. Here's what the link looks like from the code:
Not interested anymore? <a href="#" style="color:#999999;" >Unsubscribe</a> Instantly.

Is there somewhere to enter this link? Where is this supposed to go and how does that work?

Also, the editor doesn't like to insert much of any formatting for the inserted picture I had. (I don't think Outlook supports the float property anyway but I couldn't get the margins to stick).

If there's a manual, it would probably explain all this. Point me in the right direction please.