The static function analyse_plugin_version_file within contrib_helper needs to be reviewed in regards to the information it is trying to find.
Certainly there are two bugs:

1. maturity is trying to match numeric. Maturity is an integer in the database but within the version.php should be a define MATURITY_*.
2. The string version of release is using $matches[3] however this is no third pattern in that query.

Cheers
Sam