I ran into this problem with more than one letter this cycle. The letters can either be sent directly by the evaluator, or you collect corrected letters in Interfolio to send to schools. I chose the Interfolio route so that I could reach out to every school I applied to and send them if they allowed direct submittal of updated letters. You can store your letters confidentially in Interfolio and have them sent by mail, fax, or email based on the preference of the school. Most of the schools I applied to gladly excepted updated letters via Interfolio, or told me they didn't have any issues with the letters already submitted.
This was definitely a headache, but there is a solution. Good luck!
