OK, you have some steps to follow. I am going to assume you are not familiar with VBA.
Save your template to a folder where it is going to live.
In Excel press ALT+F11. This will open the VBA development window.
On the left side of the window, you will see a list of open files. At the top you should see PERSONAL.xlsb.
Right-click on PERSONAL.xlsb and select Insert > Module
If you do not have any macros yet, you will now have a folder under PERSONAL.xlsb called Modules, and a component under that called Module1.
Double click on Module 1. You should see a blank window to the right. This is the code for Module1.
Copy the following code and paste it into that window. Update the red part to match your path.
Click the little "save" icon in the menu bar of the VBA environment. This will save changes to the PERSONAL.xlsb file.
Close the VBA window
Back in Excel, right-click on any button in the Ribbon and select Customize the ribbon....
Now you can create a custom group in the Ribbon, add a button to it, and assign the macro to the button. If it is not clear what to do from looking at the window, let me know and I will give more detailed instructions for this part.
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