It is a good idea to backup your personal database of games once in awhile. Look for it in the directory where you installed Chess King, in the subfolder “Data”, then “Abases”. When you upgrade Chess King to any new version, the data files are not replaced, so you should not lose them during an upgrade. It is nevertheless a good idea to back your game database up and move it off site in case you lose your PC for example or the hard drive dies.