I've ordered lots of wpDiscuz addons at different times of the year. How can I change to just the addons bundle?

I've ordered quite a few of the wpDiscuz addons at different times of the year.

It's meant that I've not been able to take advantage of the bundle offers because they all have different renewal dates.

To make this easier and to save money, I'd love to move to the addons bundle for wpDiscuz.

How can I change to just the addons bundle from all the addons I have? Is that possible?