importing and updating problem with mac


 I have been using endnote-6 mac version for a week. I bought it. before that i had endnote 5. Now I can not import any data from my files. it is frezzing. and second problem is, with endnote 5 i alway wrote  only DOI number to add a new reference and could easly update the reference in a second.   Now, with endnote 6 it is freezing again. I had used both programs with licence. Now only can I do it, add reference with manual. 

Thank you for your help in advance.