Thank you Daniels! I had tried cmd yesterday but got an error. I see now it was because I added quotes around the file path in the set command thinking it wouldn't properly read the spaces.

Thanks so much for the help! My eyes will be forever grateful

Hello Daniels,

Thanks for replying. I tried running those commands, but the result is still the same.

This was the initial result:

PS C:\Program Files\Sweet Home 3D\lib> set SH3DINST="C:\Program Files\Sweet Home 3D"
PS C:\Program Files\Sweet Home 3D\lib> "%SH3DINST%\runtime\bin\javaw.exe ...

Hi,

I've tried using the FlatDarkLaf but am not having any success. I've never ran any java swing program like this before, so I might be missing something simple.

I added flatlaf-3.4.1.jar into the sweethome3d\lib folder. I ran "java -jar SweetHome3D-7.4 jar -Dswing.defaultlaf=com.formdev.flatlaf ...