After install theme, we active HOME DEFAULT as default, if you want to set up another home page. You can go to Customize and click to More Actions at top and choose Import Demo.
The popup will show Demo Versions and you need to choose one demo you want to use and click Set Up button.
Note: After import demo, you still need config to show product because some section need product or banner or collections so you need to choose it again.
Besides, you must click here to import default pages. This help the Wishlist, Rcently Viewed Product,.. function work correctly
You can also import/export your config data:
If you have another store and want to the user from old from (use same Gecko theme), you can copy setting by click Export from the old theme and copy all code, paste to Import from the new theme.