Hi Guys,

I have just installed Excel 2010 on a new machine and some of my Excel files created on Excel 2003 will not open. I have read elsewhere that this problem "may" be solved if I change the ending of the files from .xls to one that is more readily recognised by Excel 2010 - I am told .xlsx

In my directories I only see the file name and not the extension. How do I go about being able to see the extension in the directory and then changing it to the desired new one?

If you can help I'd be VERY grateful,

John