Is it only the tone defeat and EQ, or is it also losing speaker configuration and everything else? If it's losing more than just EQ and defeat, connect it to the network so you can access it with your computer if you haven't, already. You'll want to go into the Setup Menu and turn on Network Standby and find the receiver's IP address, too. Once you know the address, enter that in your computer's browser and go into Option, so you can enter the Maintenance section. In there, you should see the Save Configuration button. Do that and save it to your desktop and then, reset the microprocessor (instructions for this are in the manual). That usually solves problems with settings and configuration. Once the microprocessor has been reset, you can go back into Maintenance- below Save is a button called 'Load'. You'll click on that and when it asks for you to find the file, you'll use the one saved previously.
You won't be able to open that file to see any info- it's not a Windows or iOS file that can be viewed.