Problem to manage installation BizBoost Pro & FSE Pro Plugin

Good morning, I purchased the two products "BizBoost Pro & FSE Pro Plugin", I downloaded and installed BizBoost Pro on my WP, the problem is that I started making the website on BizBoost and now I don't know how to evolve my site on the pro version, without having to completely rewrite the site. can you help me understand? Thank you and have a nice day