Ok, I figured something out. It's realted with my laptops resolution i guess, in my case FHD 1920x1080. When I make changes CCleaner64.exe properties, fonts turning sharp and icons too but icons doesn't look smooth.
You're right Andavari, everything is blurry.
And yes CCleaner 5.02.5101 and win 8.1 (64-bit) with all the latest updatest are correct. For the information I've tryed CC 64-bit and regular versions, both looks same.