Ingestion doesn't let me define fields

I’m really excited to try this plugin, but it’s giving me trouble. I have configured all the settings under Configuration and Post Info, and I have uploaded a file. Then I go to “Ingestion” and I select the file I want, and here’s where I run into trouble. In the tutorial video ( http://youtu.be/yHya5eTBw0Y ), as soon as you select a file, you get to define all of the post fields. That’s not what happens for me. I select a file, and then I see a drop-down field for “Mapping Presets,” a text field to name the present, and buttons underneath to create, update, or delete a preset. The dropdown menu is empty. If I type a name in the field and click “create preset,” it says that my preset has been successfully created, but if I leave the page and come back, that preset is no longer there. Once I have created a preset, nothing else happens – I just see those few fields, and never see the options to define the post fields.

I disabled all of my plugins, and that didn’t make any difference. Firebug’s console only gives me one error message:
NetworkError: 404 Not Found – …/wp-content/plugins/supraCsvFree/img/patience.gif
which doesn’t seem relevant to this problem.

Has anyone else encountered this? Any suggestions for how to fix it?

http://wordpress.org/extend/plugins/supra-csv-parser/