Notification box is too small on high DPI displays

I have installed WiFi Guard on a Microsoft Surface Book, which has a high DPI display screen.

The yellow WiFi Guard notification box concerning an unrecognized device found on the LAN is tiny in size - about the size of a postage stamp. The text does not fit within the tiny box, which displays only a few letters. There is no way to resize the box. The result is that the notification is unreadable.

Can this be fixed for high DPI laptop screens?

Thanks, Andrew.

I forgot to add, clicking anywhere on that tiny notification box causes the box to disappear completely from the screen, rather than allowing editing of device Properties, etc.