There are times where you have a link shared with others but you need to update the file where that link is pointing to. Below are the steps to do so.
1) Log into your ShareFile account from a web browser.
2) Find the file that you want to update which has an active shared link.
3) Hover the drop down carrot and click “View Details”

4) A pop up will appear where you can click “Re-Upload File”

5) Choose the file to upload
You have now successfully updated the file and kept the shared link active.