Hi,
Can't you double-click to open Excel Workbooks?
Recently there have been several users post about the problem that Excel 2016 or 2013 can't be double-clicked to open after updating Windows, you can try to repair Office and check if this issue is still existed:
As a workaround, you can open a blank Workbook and open from File- Open.
You can try to give a feedback to Microsoft about this problem:
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