If you have saved any new settings for Futures Options, you can restore the default settings by right clicking in the Futures Options table and clicking on Defaults. Then click on Apply Default Properties to the Option Chain. The default values are applied. To remove the defaults altogether, click the Remove Default Option Chain Properties.
To save the changes to the Futures Options as defaults, right click the inside the window. In the pop-up, click the Defaults option. Click the Save Option Chain Properties As Default option.