Import/Export options on multi-site network

Hi,

I’ve a WP MU site with 5 sites and a theme (Gauge from themeforest) that use Redux Framework to manage style and other options. There a tab to import/export options via URL or File. I’ve tried both, with the attempt to copy all data from first site to all the others. All seems to go well, the page reload after click on import and appears the “settings save!” message. But, the options remains the same, the default one. How can I copy and paste the options in all 5 sites to avoid copying everything manually.

Thanks!