Mint Overlays Desktop Edition is sold exclusively through Gumroad, an independent third-party payment platform. All payments, billing, invoices, and refund requests are processed and governed entirely by Gumroad — Mint Overlays does not collect or store your payment information.
To request a refund for a Desktop Edition purchase, please follow Gumroad's own refund process, described here: How do I get a refund? — Gumroad Help Center. The refund policy that applies to your purchase is the one shown at checkout on Gumroad at the time you bought Desktop Edition.
If you have trouble reaching Gumroad or have general questions about your Desktop Edition license, email us at mintoverlays@gmail.com and we'll point you in the right direction.