No install button in Avast Free offline 17.4.2294 custom install dialog box

I ran the offline installer for Avast Free 17.4.2294. I opted for a custom installation and selected my choices. Where is the INSTALL button? It was nowhere to be seen. The only way to exit the dialog box was to click the window close X button.

I also had the offline installer for Avast Free 12.3.2280 and this did provide me with an INSTALL button. Problem solved after updating to the latest version.

It does not help matters that it is not possible to view Avast dialog boxes in entirety on the many laptop screens with 768 vertical pixels of resolution.

avast does show everything on 768 vertical.
And there was no need to start a thread about it as there are already several others about the same.

Could you please show a screenshot?