About Hyper-V client , some more info

I am evaluating the use of Urbackup on Hyper-V VMs and I have a question
Suppose we try the enhanced UrBackup client for Hyper-V, what happens after it expires
I am pretty confident that it will work great out of the box but the purchase is not in my hand and I want to know the full options.
Any use cases anyone can share ?

Thanks in Advance