You can dig into the underlying Linux and delete the file manually to clear the password. I have a feeling reinstalling Polyscope may not even wipe that out.
To do so, plug a keyboard into the pendant and then hit Ctrl+Alt+F1 (for your reference later, Ctrl+Alt+F7 will take you back to Polyscope)
Now type “root” as the login and “easybot” as the password (it won’t look like you’re typing anything in for the password, but it’s working)
Now type “ls -a” (that’s lowercase L s SPACE -a) to List All the files. You should see a file named “.urpass.file.” This is the one you need to delete.
Run the command “rm .urpass.file” to remove it. (You can use the TAB key to autocomplete the command so you know you’ve typed it right). Run another “ls -a” to verify that this file is gone, then reboot the robot (Ctrl+Alt+F7 to go back to Polyscope). Now you can re-set your password to whatever you want.