Hey there!
Quick bugfix release here. I noticed a bug in the last alpha where game metadata would be deleted after playing a game. @jxhug tracked the bug down to an incorrect value being written to ~/Library/Application Support/Phoenix/games.json when updating the "last played" stat which was causing the data to fail to match the internal Game object resulting in games.json being overwritten. This bug has now been fixed.
One other thing about this release is that we added a new value called isDeleted to games.json which needs to exist for file to be valid. Unfortunately this means that your old json file is no longer valid and will need to be replaced with a new one. This means that game metadata such as descriptions, stats, icons, headers, etc. will be deleted when updating to this version. I apologize for the inconvenience of having to re-add all your games, but aside from manually editing json like in alpha 2 there isn't much we can do.
Thank you for your patience and I hope that you will enjoy using Phoenix!