Thanks for sharing.
But if you want help then mark this thread ANSWERED and repost it in the Sql Developer forum
When you repost you need to:
1. provide ALL info about the Sql Dev version and platform you are using
2. SHOW how you are exporting the data (i.e. using the wizard or using a select /*csv*/ * from myTable query)
*** moderator note: Question now moved to the SQL Developer space ***