VeeamZIP began using a license up in paid versions after 126.96.36.1996.
This was expected behavior, but the decision has been made to change this behavior in order to allow users to back up VMs with VeeamZIP without using a license.
This will be fully changed in future updates. There is a fix that will change the behavior in the current version of the software. Please contact support to retrieve this fix.
Please be aware that starting from September 2018 downloading updates will require an active contract for the corresponding product.