The most common issue with updating the app and firmware is that it logs you out, and then requires you to log back in. Many people log back in with the wrong account, and think that the update has somehow removed all of their devices from the account. This is the majority of calls that we see with the new update.
Another issue we commonly see is that customers are selecting the sleep option after updating, which effectively turns the cameras off. If you select sleep, you must then select wake up.
Lastly, to view the video on a device, you have to pick the video option, and then pick the device from the list which will bring up channel 1, to change channels on an NVR, you use the small down arrow visible at the top of the live picture. The method used for changing channels is significantly less intuitive than the previous version of the app. Many people call for that alone.