Yes, you will need to apply again from the beginning for a waiver recommendation. You can use this new information to support your reapplication. If your application is still pending with the Waiver Review Division and you have not received a final determination yet, you should send the information on to the Waiver Review Division.
Note: Please remember to write your waiver case number on any documentation you send and on the outside of the envelope.
Yes, requests to reopen an exceptional hardship application are made through the USCIS. If USCIS determines the new information warrants a reopening of the case, USCIS will forward a new Form I-612, Application for Waiver of the Foreign Residence Requirement, to the DOS for its consideration.