You can access all your previous purchases through LemonSqueezy.
Purchased before May 18, 2023?Use Gumroad's License Lookup instead
LemonSqueezy and Gumroad are both payment-processors used by software-developers to handle payments and manage licenses.
You may have heard of equivilant services such as Ko-fi, Patreon etc.
Learn more about: LemonSqueezy | Gumroad