I'm been using BTSync for years now but now they rebranded and made versions of it. Now how I upgrade BTSYnc to Resilo plugin? Or is this so stupid that I have to uninstall BTSync and re-install all with Resilo?
I suggest you try the following.
install resilio to it's own jail
copy your /var/db/btsync directory from your btsync jail to /var/db/resilio in the resilio jail
try starting resilio