Same issue on 3.9.1.
The exported file just contains the following:
<br />
<b>Warning</b>: mysql_result() expects parameter 1 to be resource, boolean given in <b>C:\xampp\htdocs\wp-content\plugins\adminimize\adminimize.php</b> on line <b>1600</b><br />
I’m building a site on a dev machine and incrementally moving it into production, so export/import would be perfect for this.
Thank you!