Editing Donator Information fields

Dear David,

Great plugin,
Apologies if this has been answered before.

How do I edit the donor information fields?

Instead of First Name, Last Name and email, I would just like a Username reference field.

How can I do this?

Will donate $10 as this edit would make all the difference to the use of this plugin on our website.

Thanks,

https://ww.wp.xz.cn/plugins/seamless-donations/