Included in the library are a lot of pieces I'll never use, making it difficult to find those I want. Is there any way to delete them? And to save pieces I create myself?
However, another option to put all your own furniture in a category of their own (add to catalogue with a new name) and limit the display to just that category.
If you want to be more elaborate, you can use numbered categories (01_living, 02_bath) for your own stuff so they will always be listed on top of the categories.
ok
PS. If you want to manage a lot of import models, you should look at the FurnitureLibraryEditor (separate download) to keep it all in order.