If you have old XLS or XLSX file you want to open and no longer have Excel there are options. Get Open Office, it’s a free open source application that has all the same type of programs as Microsoft Office. Open your file in that program and do a save as to a text file or your desired format. You may have to play around with it as a spreadsheet does not easily convert to text. Why do you no longer have Excel? IF you found it cumbersome to work with, Open Office will be about the same difficulty in learning.