Another user who described your exact same issue did the following and it worked.
Launch StremVision. Go to your devices in StreamVision, and delete the Pulsar Device that won't allow downloading. Reboot StreamVision device (phone/tablet), launch StreamVision and wifi on Pulsar device, and connect like the first time. This will restablish link and add your Pulsar Device back in StreamVision. Then start your process all over again, as you will need to get Internet Access to your device again and launch StreamVision. It should see you can download new software and continue as it should have been the first time.
