MasterPress requires a minimum of WordPress version 3.3, MySQL 5, and PHP version 5.2.4.
The MySQL and PHP versions are the same as the baseline requirements for WordPress as of version 3.2. More information is available on the official WordPress site.
To run MasterPress smoothly, we recommend that PHP is configured to use a memory limit of at least 64MB per request (128MB may be required for sites with higher complexity). Please refer to this article for more information on how to increase the memory available to WordPress.
This plug-in is not compatible with the WordPress.com hosted service, as their services does not allow third party plugin installations.