Transfer Endnote Library X2 to X1

Is there a way to transfer an X2 Endnote Library to the X1 version?  Saving the library and just trying to open it in X1 did not work.  I could be doing something wrong, but any help is much appreciated.  Thanks!

There should be no problem but you need to ensure you have both the library.enl file and the library.DATA folder. 

The safest way to make sure you have what you need,  is to compress the library from X2’s File>compress library (or it might still be “send to”) creating an enlx file, and opening that with X1.