To upload a new version of a file, click the file, then select the file options menu. In the file options menu, click New Version.
Select the file you want to upload. When finished, click Open or Upload. In the file details, you will be able to see all versions in the "Modified" section. To view all versions, click Versions.
The file preview page will open. The file history will display on the right-hand side. View and Download any version of the file.