Compatibility with Google Product Feed

Hi,

I’m using the WPC Product Bundle Plugin to manage bundles in my website.

I have created a google product feed for my Google Merchant account, but the bundles are not showing up, no matter what information I add. I am using the free version of the plugin.

Is the premium version needed for compatibility with Google Shopping? Am I doing something wrong?

Many thanks

The page I need help with: [log in to see the link]