v15 error Rated 5 out of 5 stars

I have been collecting data with this program for about a year now. Everything has worked perfectly until yesterday when I discovered that data from the end of May upto now is missing.
I have Firefox 15.0.1. The files can be found in the scrapbook data folder, but they do not display in the search tree and I am unable to import them - an error of Can't copy files appears.
Is this problem related to the v15 firefox and are there any solutions?? Thank you.

This review is for a previous version of the add-on (1.5.5.1-signed).