To repeat a suggestion I made when you reported this over in the FM Pro forum:
Check the windows display control panel. Is it set to 100%? If it is not, change it to 100% and see if that makes a difference in the results that you get.
Thank you for your post.
I don't have immediate access to a Windows 8 machine, but I am unable to replicate the issue under Windows 7.
Also check your system's display settings. A number of graphic issues have been reported on Windows OS when the display settings are set to anything other than 100%. If your settings are 125%, switch to 100% and see if the issue continues.
If this is not the issue, let me know, and I'll seek out a Windows 8.1 machine and test it. Any other information you can provide may also be helpful.