Thank you for your help.
I downloaded it from the official site, always.
I worked with GPU processing ON. I turned it OFF now. However I could not load
my old project, because Shotcuts complains I used GPU effects in the file
and will not open the project if I change the GPU settings.
So I made a new Project.
I can see the blend mode menu now
and I also works well.
I didt not know the GPU has this influence.
I now can also import the PNG files that made SC crash before as in my previous post
