The default credentials are: Username: admin | Password: secret (It's strongly recommended to change these default admin credentials after initial setup for security).
Navigate to Hotspot Settings
On the side panel menu click on the "Hotspot".
Go to the Security Tab
Within the Hotspot section, look for the "Security" tab.
Change current settings
On the Security tab,
Change "Security Type" for "WAP+WAP2"
Change "Encryption Type" for "TKIP+CCMP"
On "PSK" (Pre-Shared Key), enter your desired new Wi-Fi password
Or if you'd like, the "magic icon" next to it can generate a strong password for you. Note: this password is a combination of random number and letters, if you choose this option, make sure to safely save it somewhere.
Save and Restart Hotspot
After entering the new password, scroll down and click the "Save settings" button.
You will then need to click on "Restart hotspot" for the changes to take effect. This will temporarily disconnect all devices from the Butter Box as it reconfigures.
Save settings and then restart your hotspot