Hello,
FreeMASTER is an typical Win32 application and all windows dimensions are given by the system.
You can perhaps try to change the font in the Variable Watch to make at least the data grid larger, but I'm afraid the window title bar and other system parts of the windows will remain small.
For graph views, there are some options in "Global Graph Settings" dialog which should enable to scale up the graph elements.
Can you send a screenshot of the most problematic portions of the window?
Thanks,
Michal