Is it possible to convert old config to latest version? On plugin update my config get wiped :(. Could someone help me with it please?

if having issues then update 1 version at a time

will it bring my config to the latest eventually? 
I am using

6 "Raidable Bases" (1.4.8) by nivex (47.24s) - RaidableBases.cs 

yes. just save a copy of your config. as always