Project on GitHub: https://github.com/Tezlastorme/build-prop-tools/
The download link is there on the project page, along with the source.
The methods are all documented, and there are a couple of wiki pages, an FAQ (it's not a very long FAQ ) and a tutorial.
Do not report a crash unless you have read the FAQ, and when you do, post a logcat, preferably errors only.
I CAN NOT HELP YOU WITHOUT A LOGCAT.
I hope this helps people