This is usually just a spam reply and rarely fixes it.

Try opening the 123 file with LibreOffice since it's free and supports opening that file. and other replies tell us it can import.

Remember PCs were not that good when we have one last copy. Being such a seasoned user, it's surprising they haven't run into this before and learned to make a backup copy.

-> PS. This thread will be a link free zone to stop the spam.