Btw, in the worst case, you could just do a factory reset. I know you said it didn’t work. Just make sure you hold the reset button long enough. Sometimes a quick push and release only reboots it. But a longer push and release (say 30 secs) will return it to factory defaults. That will definitely remove any previous wireless security.
NOTE: If that router had to be configured in some special way to work w/ your satellite, then you might very well get back into the router but need to reconfigure it again. Now to be honest, that doesn’t seem likely, but I thought I should mention it at least as a possibility. That's why I'd prefer you only did a factory reset as a last resort.