This is the first launch of WP MyBackup that was made public. While under development it had 150+ different intermediary versions (alpha/beta releases) that finally were merged into this final release 0.2.0.
The product was tested internally for more than 12 months with different system setup (like PHP 5.3 to 5.4.41, Unix/Windows, WordPress 3.0 to 4.3) so now it should have a reasonable maturity.
The plugin source is available for free to the public (under the GPL v3 terms and conditions) at its SVN repository:
The nightly builds are always checked out in the trunk folder.
All the intermediary releases are published in the tags folder under the names x.x.x, where x.x.x is the version tag (the higher, the newer). If for some reasons you want to use a specific version (tag) then you may simply checkout that tag like this:
where x.x.x is the version (tag) you want to use and the my-local-path is the path on your local system where the copy of the specified version source code will be downloaded.
Obviously the preferred method is to download the plugin directly from the WordPress.org Plugin Directory.