I'm confused.

I gather I need the normal.d* template from my old install and to tell W365 to use that. And I have old normal files. But:

1) I thought Word 2016 stored templates as *.dotx, and word365 stores them as *.dotm.

2) I have a bunch of *.dotx files on my old PC's drive, but no normal.dotx. What I do have are normal.dot, whose date is about right for my last settings and a normal.dotm from a year earlier (puzzling, as I don't recall having office365 on the old machine).

So is my old normal.dot likely to be what I'm after? If I move it to the folder where Word365 has its templates, how do I get it to use that file?