[BetterRed]

@dvd8n - I would do this

1. create a new library on your old computer on a thumb drive,
2. copy the 30-40 new books from the old library to that new one on the thumb drive
   1. to do that select the 30-40 books in the old library,
   2. right click and Select Copy to Library,
   3. browse to the library on the thumb drive, click OK
3. Take thumb drive to new computer,
4. register the library on the thumb drive, do that via Library Maintenance->Create New Library
5. switch to the thumb drive library
6. select all the books and copy books to the main library on new computer

BR