There must be some error log that could explain your issue.
Please open a cmd window and run Sweet Home 3D redirecting errors to a file with a command like:

Code: Select all

"C:\Program Files\Sweet Home 3D\SweetHome3D.exe" 2> Desktop\log.txt

If the file log.txt contains something, please post it here.

Error on launch ! [:D]

You must give the entire path like this :
"C:\Program Files\Sweet Home 3D\SweetHome3D.exe" 2>c:\users\username\Desktop\log.txt

I try myself for my problem with 'Save', 'Save as', 'import furniture' and create photo => After launch, file size = 0 !

[:)]