All online payments are processed by FastSpring. Selecting a purchase button above will take
you to their secure website to process
payments, or visiting https://welsim.onfastspring.com to select items.
A subscription will be charged yearly or monthly and will renew automatically until stopped
by the user. You can manage your subscription anytime via the FastSpring platform.
We will email you an official product key after receiving payment and your Computer ID
ID, in the format of xxxx-xxxx-xxxx-xxxx, is generated from WELSIM application running on
your computer). Here are the details about activation.