Hi - let's start with what you did for backups.
Did you back up to :
(1) a second PC or
(2) a USB disk or
(3) some other way.
If it was (1) and you still have the old system - or the old disk(s) - there is hope.
If it was (2) then there is maybe hope, maybe not.
If it was (3) then you need to spell it out and we can look to see if there is hope. But until you do, I do not know.
I say WE because I can give you information but you have to do the work.
You need to give more information about the old system, the backups and the AFFA config file. (In /etc/affa and its a file called {something}.conf eg serverbackup.conf
Cheers
Ian