Add to Cart and Read More Buttons

I recently bought 2 plugins the Product Bundle and the Mix & Match. I have tried these plugins now and they allow me to do all that is required however if a customer selects these Product bundles or Mix & Match products it does not show an “add to cart” button but rather a “read more” button that acts as the add to cart button. Can anybody please assist me in sorting out this problem.

https://www.ads-software.com/plugins/woocommerce/