Disable Annoying popups

I bought PDF Architect 4 only last August with every option but OCR. I am being hounded by a pop-up in the right lower corner of my screen urging me to buy PDF Architect 5.

A notice a new release is available is helpful, but constant interruptions of my work when I only bought this software less than a year ago is too much. This kind of frequent intrusion will not improve sales and is not winning PDF Forge any friends.