Payment on GT3 website broken

My license to the pro version has expired and renewing fails when transferring to PayPal (error is “Things don’t appear to be working at the moment. Please try again later.”).

Is GT3 still a going concern or has it gone out of business? If it has gone out of business, how do I continue using the pro version (the plugin is coded such that an expired license causes the plugin to no longer function)?

Thanks!