Steps I took that resulted in the problem:
Running the program I see a 'zoomed' application on the screen.
In the past I had similar problem on other QT program, solved disabling the dpi auto detect.
Is it possible with fritzing ?
What I expected should have happened instead:
A normal size
My version of Fritzing and my operating system:
0.9.3b on Linux Debian 8.9 x86_AMD64