The main product is always shown, while the others selected in administration panel will be randomly shown.
The integration is available only when using the premium version of YITH Frequently Bought Together and with both the free and premium versions of YITH Wishlist.
If you have enabled the option Hard Crop from the General settings, you have to regenerate images for all products to display them all of the same size. You can use this plugin to do so.
Yes, the plugin supports importing and exporting the information related to frequently-bought-together products into a .xml file using the default WooCommerce import/export tool available in Tools > Export > Products.
Yes, you can either add the variable product and let the customer choose the variation, or add the specific product variation.