You can immediately use ShellDispenser-Dev after purchasing your license. Furthermore, all versions released within one year after purchase can always be used free of charge, and you get free technical support via e-mail when necessary.
If you want to use a newer ShellDispenser-Dev version released after this first year, then your license can be updated at a reduced price.
And if you are not satisfied afterwards, you can always ask for a refund within 30 days after purchase!
The payment processing is handled by Avangate, a leading e-commerce provider.