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

<r>Hello Daniels,<br/>
<br/>
Thanks for replying. I tried running those commands, but the result is still the same.<br/>
<br/>
This was the initial result:<br/>

<CODE><s>[code]</s>PS C:\Program Files\Sweet Home 3D\lib> set SH3DINST="C:\Program Files\Sweet Home 3D"
PS C:\Program Files\Sweet Home 3D ...

<t>Hi,<br/>
<br/>
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.<br/>
<br/>
I added flatlaf-3.4.1.jar into the sweethome3d\lib folder. I ran "java -jar SweetHome3D-7.4 jar -Dswing ...