maybe if show us what you want to achieve, we could help you.

Kijk eens bij Haefele Succes

I used to play with the trial version (you should try the trial for sure). Some positioned materials didn't come through but they may have been too deeply nested (Al told me later that I should explode groups/components prior to exporting).

Happy to help. If you don't want those units to show in future models, remember to open a fresh SketchUp session and make that setting. Then use File>Save as template to make a new default template.