Don't IMPORT
Simply COPY the 2 folders to their proper place
This can be done very quick if both are on the local network. But a flash drive will work
http://manual.calibre-ebook.com/faq....ter-to-another
here is the steps I have used many times
1) Install Calibre on new computer << you say Done
2) Open the Configuration Folder (Preferences: Miscellaneous)
3) Leave the FOLDER OPEN, but shutdown Calibre
4) Replace the ENTIRE contents of the Config folder with a copy
from the OLD Computer
5)REPLACE the ENTIRE
contents of the new Library Folder with a COPY of the ENTIRE
contents of the Library folder from the OLD computer
6) Start Calibre