I actually don't want to build the software, I also don't want to modify it. I just want to look at it to figure out your file format quickly to process the file with my own tools. I have way too many tabs saved as sessions and always fear they might get lost; also recently my Chrome slowed down and it bothers me that I can't easily deactivate Sidewise, as I've grown dependent on it. It would comfort me to see that the code is available, so that I can fix it in principle, whenever I might have to.
So, please just put it online. Maybe have a public bitcoin address so that we can forward you some thank you in digital currency, if you're so inclined.