If you choose not enroll into a Kasa Care paid subscription plan by the end of the trial period, your Kasa Care Services will convert to the Free Plan that only provides access to two days of Kasa...

have you tried other fixed wireless channel? or try to adjust the angle of antenna to help you get better signal.

Generally speaking, V2 is better than V1. V2 has some improvement on functions. If it's possible, I would love to choose v2.

Login to the web UI of D50 to check whether the currnet firmware is the latest one on tp-link official website. If it's not, download the latest firmware and update it. How to update and you can...

Did you reset it successfully? If you reset it successfully, the default password should be admin. Since you have reset it, have you reconfigured it? Make sure the camera is connected to the network...

Since you mentioned it's connected via a cable, you may try to check whether it's shown on the DHCP list on your router. Try to restart the cam and change another ethernet port on the router.