PdfPenPro Opening Uncontrolably


On my MacMIni2018 (Mojave) I have installed PdfPenPro v11.1.

The only problem is that it keeps on opening incessantly and bringing up the dialogue box as shown.

I have unticked the automatic opening of downloads in Safari.

Is anyone else having a similar problem? Is there anything I can do? I’m almost at the stage of deleting the app, which would be a pain, as it is my go-to pdf app of choice.

Any help much appreciated.

God bless,