If your application is only going to be distributed within your own organisation you just need an Enterprise license.
As long as you have an active WizTree Distribution License subscription, you may:
Note that you do not receive a WizTree license code with this license. The WizTree Distribution License subscription simply allows you to package the "free" portable version of WizTree with your application.
WizTree Distribution Licenses cost US$1,200 per year. Click on the button below to create your subscription: