Since version 1.7, I have been unable to use this plugin. I get this message where the button is supposed to appear:
Fatal error: Class 'paypal_donations' not found in /home/technigh/public_html/wp-content/themes/technightowl/single.php on line 47
The section referenced has something inserted by a theme designer with whom I have no present contact.
$paypal = new paypal_donations();
What do I change to get your shortcode to function?