This is probably an easy answer but I had to ask the question.  I just downloaded a new route I bought. I went to my content manager (Tane a new era) to see the new content downloaded today so I could add things to my pick list.  All the payware items showed along with about 50 built in items. Why would built in items show up?  Were this from previous versions of Trainz? If it is from a previous version I guess I should go to my previous version  and import the content and delete all that no longer work.