As Mavenzilla is still in an early development stage. The distribution of version 0.2.1 is considered still unstable. The API and the features may probably change in the future.
It takes two steps:
Check out the latest version from the source code repository.
Build the binary using Maven.
Adapt the script to run Mavenzilla.
Instructions about how to check out the latest version from the source code repository can be found here.