Latest release notes: This version introduces a new filter, wfu_after_file_complete, that runs right after file has completely been uploaded, in order to perform any custom checks to its contents and accept or reject it. In addition, there are some code improvements and a better look-and-feel of the plugin's area in Dashboard. The Professional version of the plugin introduces a significant feature with this version, the ability to implement filters and actions (code hooks) without requiring 3rd party plugins. You can find out more details here.