Problem with Export as PDF

I’m using Shapr3D on a Windows machine, with the latest version.

I was able to export a drawing in pdf format and it actually saved the file, a dialog window allowed me to make some settings (such as the size of paper, etc).

I wanted to change those settings, so I’ve tried to export the file again, but now, it never gives me an opportunity to change those settings. The new file is just created with the former settings.

What am I doing wrong here, to be able to change settings when a pdf file is created?