I like your plugin it's really usefull.
I have a few customization questions and i hope you can help me.
When people click the donate button i would like to see that paypal would open in a new page, how can i do this? I searched through the code but i can't find a <a href or something.
Is it possible to add the username (if logged in) to the reference? I tried in the admin with <?php get_username() ?> but it will just put "<?php get_username() ?>" in the paypal page and not the real username.