How to open a specific PowerPoint file when PowerPoint starts

Factual Questions
1

I have created a file called Macros.pptm that contains PowerPoint macros that I want to be available on the Ribbon and quick access toolbar. PowerPoint does not have a standard file that opens whenever the application is opened, unlike Excel (PERSONAL.xlsb) and Word (Normal.docm). There does not even appear to be a way to make your own (Word has a STARTUP folder, so it opens everything in that folder whenever the application starts).

When I assign Ribbon buttons to macros in Macros.pptm, they will not run unless that file is open.

Is there any way to automatically open that file every time I open PowerPoint?

2

Edit the PowerPoint shortcut and add the filename at the end of it.

so it’s like c:\program files\blah blah\powerpoint.exe “my-macro-virus.pptx”"