Did u try setting your screen resolution lower like 1280x1024 0r 1920x1200

java seems to have a problem with 4k resolutions
read; https://pivotce.com/2017/12/11/fix-java ... i-display/


Find java.exe and/or javaw.exe likely found in C:\Program Files\Sweet Home 3D\jre8\bin\javaw.exe
Right click on it and select -> Properties
Go to Compatibility tab
Check Override high DPI scaling behavior.
Choose System for Scaling performed by:
Click OK

i hope it may help you