IE notification menu - Can't select "Open" with mouse click

I admit I am relatively a novice to RPA. I have read some the previous responses to this type of issue. I have tried clicking on an image, which this did not work for me. I want to avoid any over-elaborate work arounds. It’s pretty simple. What I want to do is download an excel binary file (.xlsb) and save the file as an .xlsx file. Any advice?