Do you really need to keep compatible with that old KiCad version?
As far as I know a modern KiCad should always be able to open and remap projects from older KiCad versions, but some fiddling with settings for libraries etc may be required, so just to be carefull: make a backup and/or do the remapping on a copy of the old project.
There have been multiple similar threads on this forum, so you can search this forum for more info.
A good place to start reading is in: