unable to access tty.usbserial port

My arduino and MAC Mini had been working fine until I tried (unsuccessfully) to install tty.Bluetooth.
Now, when I try to return to USB control, the tty.usbserial port does not show up on the tools menu,
only tty.Bluetooth is listed. Any help would be greatly appreciated.
Thanks,
Ed

Uninstall bluetooth?

Thanks for the reply. How would I uninstall Bluetooth?
Thanks,
Ed