These are the steps how to change the wifi WPA-PSK password:
1.Type this url: 192.168.254.254.
2. Log in your account. ( admin) if you didnt change it
3. On the left side bar, Go to General Settings
4. Then on WPA-PSK, Type in your desired password. It must be not less than 8 characters and not greater than 63 characters. A-Z, 0 -9, a-z combinations.
5. ONn the WPA encryption type, select AES
6. Then click on the submit button.
7. Restart the device.