how to get all the configured environment once SCVMM 2012 R2 evaluation expired

Hello expert...

We had SCVMM 2012 R2 environment where Hyper-V host cluster was created ,cluster storage was added and VMs are highly available on cluster storage but it SCVMM 2012 R2 evaluation had got expired.

I have Questions before activate it with product key.

How to activate SCVMM 2012 R2 with Product Key such that we can restore same configured SCVMM (storage,network,cluster,VM highly available) or is it possible restore SCVMM Configuration.

Do we need uninstalled SCVMM before if its need reinstalled.

Any Help will be appropriated..?

 Thanks

Richa