Blue iris 5 was released on June 1, 2019 so your support should not have ended until June 1 2020 unless you were carrying over priority support from V4 and got a free upgrade to v5. Regardless, although technically the Blue Iris website indicates (and has in the past for v4 as well) that you get free minor updates for 1 year, in the past he was always providing them free. This is the first I have heard of a system reverting to demo mode because of support lapsing. My guess is there is some other issue with the license key and it manifested after a license check during the update.