To start with, most people who used to use Open Office have switched to its successor, LibreOffice. Didn't you?
Then, how to you 'try to open' such a saved document? Via File>Open in Writer and Calc, or by doubleclicking in Windows Explorer? If the last, check the file association for .doc(x) and .xls(x) extensions/filetypes. How to do that depends a little bit on what version of Windows you use (XP, Vista, 7, 8.1, 10), so I can't give precise instructions here how to check it and how change it back to Writer and Calc.
Hi Everyone, I have been using openoffice text and spreadsheets for several years, using the drop down to save as word/excel with no problems. Suddenly now when I try to open the saved document I am being told that I need to trial then buy the microsoft office package!!! This rather defeats the object? I would appreciate any help to find a way to get this option back. Incidentally I have tried uninstalling and reinstalling Open Office but get the same result. I believe the problem lies with microsoft?