The Paypal address is optional for Client and Reseller settings.

Till Brehm

2016-01-29 ab0d78da3371c569cd7ca0832339bd5de8ad3544

 interface/web/tools/interface_settings.php

@@ -126,7 +126,7 @@
         print '<script type="text/javascript">document.location.reload();</script>';
         exit;
      }
      else parent::onShow();
      //else parent::onShow();
   }