Comment 1 for bug 614229

I spent a bit of time looking at this today. There is no obvious changelog or release notes (except they finally have one starting with the still-in-development 2.13). And the developers appear to basically support Mac & Windows. I couldn't find the Qt viewer any more so I'm guessing it's been removed completely.

While the Debian/Ubuntu version is out of date, the lack of a GUI is a significant regression. And the package has changed so much in the past few years that this is more of a new package than a simple update. I don't have the time to work on this.