Steps I took that resulted in the problem:
Just run the program and after program loads, Fritzing stops working.
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Solution:
Change compatibility mode to Windows 8...
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My version of Fritzing and my operating system:
0.9.3(b 4.19) 64 on Windows 10 Pro x64
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EDIT: Well, Fritzing updated some files and than I tried to run program w/o compatibility mode and now it looks it is working normaly.