Woocommerce variation pictures

Hi over there. First thanks for this plugin which works wonderfully and really does what it should. It is right now a great help forme to set up my woo commerce site.

I have selected under Post types the type product and featured items. This world wonderful, every image loaded from woo commerce as a product post type get watermarked. woocommerce offers variations for products, variation which can have different pictures and those pictures are also loaded via the media library product. My product pictures get a watermark, my variation pictures not.

I fully understand that you can not answer every inquiries and problem, but I would be really really grateful if you could point me in the right direction to look at in the plugin, since I have some basic/advanced knowledge of php.

Thanks a lot in advance!
Pierre

https://wordpress.org/plugins/easy-watermark/