I am not sure if we are talking about the same thing. It appears that you are talking about the main file and the two .old backup files. Mine got over written so I am actually talking about the files who's naming scheme is "worldname_backup_numberstring-numberstring". The reason I want to convert those manually is that the in game restore function appears to be broken as it does not even make an attempt to restore files. I tried to manually rename those backup files to VH's naming convention but it does not create a valid file format.

I do not understand this though "With X∈{x|0<x≤4}. You can change the default max of "4" in VH's Misc menu."