Changes:
Library Management
* Packages and Device Sets can now be copied into the currently
edited library from other libraries, either through Drag&Drop from
the Control Panel or by using the COPY command's new extended syntax
(see "Help Copy").
* New package variants can now be created by directly using packages
from other libraries, either through Drag&Drop from the Control Panel
or by using the PACKAGE command's new extended syntax.
* The packages of the currently edited library can now be updated with
those from other libraries, either through Drag&Drop from the Control
Panel or by using the UPDATE command's new extended syntax.
And more! please review this link to see a full list of changes:
http://www.cadsoft.de/version41.htm