Norton has this 'feature' where if it has not seen a file before it appears to decide it must be bad as if it were good other people would have used it. Unfortunately this seems to fall down badly with anything new or at least does pretty much every time we release a new patch or product.
I believe you can retrieve it via the Norton UI and I am sure someone will be along to explain how, but I would like to suggest you consider changing AV packages next time you come to renew. Doing so might let Norton know that this kind of 'protection' is counter productive.
I really don't know how Norton have avoided legal hot water with this feature as it would seem to me that they are in a position of trust with the users and they have made a statement that something is bad without any evidence to back this statement and which can be later proved to be false and which is causing actual harm to the reputation of others.
