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#21
I have been having the same problem. I tried the steps others have suggested, but too no avail. However, I think I have found a simple solution.
I noticed that in the Set Associations dialog, the program being used for .xlsx was "Microsoft Open XML Converter". This by itself didn't seem like a problem because Word docs (.docx) were set the same way, but weren't having the same Jump List problem. After clicking Change Program, I noticed that MS Excel was NOT in the list of programs recommended for .xlsx (but MS Word was for .docx).
So to get things working again for me, I changed the .xlsx program to use MS Excel. (From Set Associations, selected .xlsx, click Change Program..., click Browse..., navigated to c:\program files (x86)\Microsoft Office\Office12\, selected excel.exe, click Open, click OK.) I then changed it back to the Microsoft Open XML Converter, but this time Excel is a recommended program and my jump lists are back to functioning again.
I've put screenshots in the attached Word document.