Great app

I have used this app for couple of trips and found very helpful. Only on problem I face again n again, many times when i edit any exiting purchase the event gets broken. On Repair app removes the broken entry. This is not an good idea because I am losing data here. Is it not possible to recover without losing data?

Also can categories and participants moved to app level ? so that i don't have to add them again n again for each event.