Funguje bez problémů na WP 4.0 a Woocomeerce 2.2.4
Plugin is not commercial! There are just skins which are commercial, but basicaly there comes two skins for free with this plugin, there are few more for free also (downloadable from author website), and rest (2 skins as far as I know) are commercial.
BTW, this plugin is great, it is not just flash gallery on your front-end, but all photo management (like NextGen) on your back-end.
