The goal of this project is to make excellent, easy-to-use software to help accident reconstruction professionals. Most software for this purpose is very expensive. If you find a bug or want a new feature, you can ask, but ...
ReconstructIt is different. Not only is your help wanted in developing this software, it is needed! Your bug reports, feature requests, and other input will drive the development of this in the direction you want to go.
Obvious reality check: Tougher items will go on the 'wish-list', things have to be prioritized, etc. You know how it is.
You can download ReconstructIt for free and make as many copies as you want per the license, and that's not going to change (legally, it can't, per the license terms).
The most important thing you can do is download ReconstructIt and provide feedback!