The project seems to be abandoned since March 2017. Latest version, v0.1.19, released in October 2016, can be still downloaded from the official website.
Not a single post or update on their website since 2016 so lets assume the project is dead.
Develop branch on github was quite active until December 2017.
But the current status is unclear, no replies on issues from the developer after 2016: https://github.com/Librevault/librevault/issues/99
Reply written over 3 years ago
librevault 1.0 has come
Reply written 3 months ago
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