Így van.
As to your question, yes you can move to pfSense Plus at any time. As long as you are a home user or using it in a lab, there will be no fee for pfSense Plus. In regards to your settings, at least initially everything will be compatible just as it is now if you moved from CE to FE (Netgate appliance). I can't speak to down the road as the products do diverge, but we will always do our best to make it as easy and simple for users to make the transition if/when they want to.
https://forum.netgate.com/topic/160282/pfsense-plus-and-pfsense-ce-dev-…