Installing Weather Display 64 bit For Intel MAC OSX10.14/10.15

It can always happen that you do something wrong, forget something or make a mistake.
I install Weather Display after download. And press the install button … great. Using the program is something else. It crashed and crashed and so on. I can’t choose meteobridge or WLL or anything else. Before that choice is the crash …
Am I really doing something wrong?
Maybe someone can help me?

Installed:
Weather Display 64 bit For Intel MAC OSX10.14 / 10.15 and above v 10.37Mac Build 360
on an:
iMacMac (Retina 4K, 21.5-inch, 2019). Thats 64bit, Intel
using:
Macos 11.2.3
Installed 3 times and restarted twice…

31/3 By the way. For what I see using other software to inspect the package. The install file is damaged (or could be damaged …) I took the install file from the downloaded package (without opening that package) and dragged it into the applications folder.