I am currently evaluating your PayPal Donation plugin and like what I see so far. I have found only one problem, using a short-code I clicked the button which sent me to the PayPal login and everything looked fine. Except when I tried to change the funding source, it seemed to let me select PayPal balance but it never did change.
I don't know if this is a problem with the plugin or with PayPal. Any help with this problem will be appreciated!