I have installed DL on my website; I can use the web interface to send and receive files. However, I'm running into a problem with getting Thunderbird (v24.4.0, the latest version) to set up the Filelink account. I've followed the directions on your website, but when I click on Set Up Account, I get "An error occurred while setting up the account!" Sometimes it happens before I get a window asking for a password, sometimes after the password request.
I don't see any troubleshooting information, so I don't really know where to go from here. I really like the idea of using DL rather than a commercial service, so it's completely under my control; I hope I can get it working.