As the file owner, you can modify most of the settings of a sent file. This will update the sent file's settings for the existing recipients.

Step 1: From your dashboard, click on Manage Sent Files in the left sidebar.

Step 2: Click on the three dots (...) beside the file. In the dropdown, select Settings.

Step 3: You'll be directed to the Settings page for the file. Here, you can edit the following settings:

Step 4: Once done, click on the Save button.