Go to http://digitalcommons.bard.edu/ and click on My Account on the top right.
Log on to revise your submission. Select your project from the section titled Senior Projects (plus the correct Semester and Year). Click on the name of your submission.
Click on Revise thesis/dissertation – this will allow you to provide information about your project and upload an updated version of your project.
If you want to include supplemental files, click on Manage additional files. Now you can click on Choose file and upload your content. Click Save when you are finished.