Are you sure you want to go to an external site to donate a monetary value?
WARNING: Some countries laws may supersede the payment processors policy such as the GDPR and PayPal. While it is highly appreciated to donate, please check with your countries privacy and identity laws regarding privacy of information first. Use at your utmost discretion.
I don't think it's a good idea to change the namespace midway development of this script. At least not without notifying. Existing users now don't get the updates and even after reinstalling get two different version of the same script.