Berenice, Are you answering for Ryan in the “we” or just your self?
I cannot help you further without your Plugin environment. Lance has answered this topic in the forums, ‘/forums/topic/export-and-import-of-extended-information-does-not-work/
Is your file in UTF 8, do you have restrictions , i.e is the PHP environment on the server handling UTF-8 properly.
I will let him know when he has time he can look to see if this is a bug, but without your plugin environment or a screen shot of your plug in environment as outlined in the READ ABOUT THIS (including your MySQL and PHP info) he may not be able to help you on an individual basis.