@Warpenny thanks for your elaborate answer, I actually need the weekend to answer it.. for now.. you touch more than the subject here. As for updating that objects library box, this was a temporary issue with a SU-4. The update solved that back in april. Since then I had some fun with cactuses, but not done much else.
I never restart the sim. To get your objects visible in the Objects box, takes a while. Eventually the list will appear and I can search for my object and place it. I always stay in the sim, no need to restart or work via Community folder. I can copy Blender files into my project, return to MSFS while it runs, close Project, then open Project Editor and load the project again. On menu Objects, my new Blender object appears and I can place it.
This part is new for me,
Thank you, I’ll try that out ! I’d like to get organized more.. keep my objects at hand. I now have a simple scenery project, I put something in and place it, like King Kong on a Paris building. I really like to play with it, wish I had more time for it. When I want to keep it, I click Export and copy to Community, until then I only use Compile (build).