Loading problem [BIG DEAL]

I was making a game for someone who hired me. then I went to work on something else for a while, and now I can’t open the other one back up! I still know where it is I just don’t know how to open it. Any one who can help me with this will get lots of love. Thanks in advance.

File > Open project > Open other > find the folder with the name of your project and highlight it > Select folder