Cannot export files to an empty folder

I tried to export tables from a database into SQL format. I browsed for a folder. If I give it an empty folder, the open screen just closes and no path is displayed (the Next button remains disabled).

If I give it a non-empty folder, then it says:
"You can choose an empty folder only.
Are you sure to use folder name as the database name demodb?"

After asking this, it creates a demodb folder within the selected folder.

The message should be edited also. From the message it can be understood that the selected folder will be renamed "demodb".