A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
saving the file as a template workbook. It hasn't worked either.
Additional Information:
If your language in Excel is not English, the names of the templates are different!
For English versions use:
Book.xltx as workbook template
Sheet.xltx as worksheet template
Make a new file and look how the file and sheets are named, example for a German version:
A new file is named "Mappe1" and the first sheet is named "Tabelle1"
Therefore the templates for German versions are:
Mappe.xltx as workbook template
Tabelle.xltx as worksheet template
Andreas.