I had to reinstall which means I have a clean SH3D.
When I open an old sh3 file all the furniture I have done during the years are there.
When I open a new from the newly installed SH3D it is of course not there.
Is there a way to get my library into the new one o I do not have to import them one by one?
Tere is of course a lot or "furniture" one never uses.
Furniture libraries are available here. If you want less items in them, you can edit each library with the Furniture Library Editor before importing it. The editor lets you also merge all the libraries in a big library where you can delete the items you don't want if needed.