Flashed NEOS Cameras - New Router

Hello…

The day I have been dreading arrived, I changed my ISP, new router, new passwords, new IP’s. Spent 4 hours last night updating everything, another 3-4 tonight planned. My question is regarding 3 Neos Cameras which have been flashed several years back.

I have lost integration, assume due to the change of IP address?

Does anyone know how I go about updating the NEOS camera with the new router?

Assume I would need to re-flash this from scratch - anyone?