Vanilla version (for both no DLC games or games without mixes eras mods)
Simply drag and drop the contents of "ovldata" into "(...)\Jurassic World Evolution\Win64\ovldata."

Return to Jurassic Park version compatible with Ultimate Mixed Eras - JPEO.
Simply drag and drop the contents of "ovldata" into "(...)\Jurassic World Evolution\Win64\ovldata."