I realize I am replying to a post 7 years old. However I currently had the same issue with QSP not scaling images correctly. I found a fix and wanted to post for anyone else who may need it.
The scaling issue is with the high dpi settings due to the 4k screen, happens a lot with various programs.
---Fix for any program---
You just have to find the .exe for the problem program
1 right click 'properties'
2 'Compatability' tab
3 'Change high dpi setting' near the bottom, check the box 'High DPI Scaling Override'
4 Now on the drop-down menu below select 'system' from the list
5 Click ok, then apply
Run and see if it works. If not you may need to change the drop down to application instead of system.
---What/where for QSP specificlly---
For QSP games your looking for the 'qspgui.exe' file, not the 'START.bat' which starts the game. Go to the game folder with the start.bat, then open the qsp folder, and find qspgui.exe, right click properties etc from above fix to override the dpi.
Now, start the game with the 'Start.bat", it should open and be all messed up ... one or more of the game windows may be hidden or not visable. Two ways to adjust them:
Click setting, show/hide, and each one from the list.
or
Press ctrl 1, ctrl 2, etc.
Then you can resize the windows as needed.
Hope this helps!