The plugin is working fine, but I can only create one due date and not on quarterly base. Once the payment was completed for example at the end of March, I can't create a new one for end of June except I delete the paid date too. I guess this is also explained on page 24 of the documentation.
The plugin always considers the contribution defined in a role (regardless of the "Contribution period" setting)
as an annual contribution. The specification of a role's contribution period is used for the "Prorated contribution calculation" function.
That's why I'm desperate for further suggestions, as I have to guarantee a quarterly payment method for our club members. Any other ideas maybe?
Maybe its me and there is a cool solution, but In my case would be cool, if one could define due date, or multiple due dates based on role memberships.