Upgrading B2B Addon from 1.0 to 2.0 version

Hi Experts,
In my landscape I am currently using PO 7.5 SP 13, where B2B Addon 1.0 is installed. I would like to upgrade the B2B Addon to 2.0 version.

Could anyone of you please advise on the steps? I already downloaded the SCA files and XI CONTENT specific to the B2B Addon 2.0.

Now-

1. Do I need to undeploy the previous B2B Addon 1.0 for all components? If yes, will this impact existing PI config and channel?

2. do I need to deploy first - Addon 2.0 and then undeploy the old 1.0 version ?

Any thoughts will be much appreciated. I have already installed Secure connectivity addon with latest patch and PL. - SFTP adapter and PGP module.

Thanks

Sugata