If you still want to for an internal request (e.g., asking your company to purchase or renew PlanSwift), here's a template:
Activation for older versions (10.1 and prior) using Customer # and Pin # was discontinued in March 2022 for security reasons. If you are using an older version, you must contact PlanSwift Technical Support to upgrade. Manually Activating PlanSwift
For those who already own a license, the activation process depends on your version: