Does not replace the ‘out of stock’ message

Hello Sebastien,

thank you for providing this plugin for free to the community. I am looking for the functionality that this plugin provides, and installed it, but it seems for some reason it doesn’t change the message on the product image in the shop overview, only on the product detail page I see the custom message next to the price. Can you make the plugin change the overlay on the product image as well?

here the dev: https://blikbrein.tv/dev/
runs latest WordPress (4.6.1) and latest WooCommerce (2.6.6). And WooCommerce Memberships.

Thank you in advance.