Changing from name of Events emails

Hello

I'm trying to edit the 'from' name for emails sent out from Events+

I noticed this thread https://premium.wpmudev.org/forums/topic/how-do-i-change-the-description-of-the-email-address-for-rsvp-messages

Which solution do you recommend, edit the po file or the php file?

Is there anyway of making this change so that it isn't overwriten after an upgrade?

Pete