Joachim, who packaged this software for Debian non-free, commented on some key discussion on the relevant mailing list.

http://www.joachim-breitner.de/blog/archives/227-News-from-the-XaraLX-front.html

Being as my employer is vaguely connected (at least historically), probably best to let people follow the link, read the discussions, and draw their own conclusions. I let Charles have the benefit of my conclusions, privately.