@mitcorb said:

You may have to purge unused items. In Sketchup, Window> Model Info> Purge Unused. I would be careful. This probably needs more discussion.

That seems to have done the trick, thanks.

I'm trying to import a sketchup file. I had previously loaded this component, but then deleted it and re-worked it in the other file. Now I want to import the new version into my project, but it keeps giving me the old version. I can import the new version if I start a new file, so why can't I import it into this existing one?