There's only one release build which contains all feature implementations, but some of them are locked behind the plans. So to some degree, they are artificial as there isn't currently a separate build for the Homelab and Professional builds.

The only service it relies upon is the licensing server, but if you also don't want to use that to be fully independent, you can request an offline license. You can find the details about that on the pricing page.

Right now, there's no direct import from WinSCP, next best thing where it can import from is Putty