Hey Andrew,
first of all, thank you for the purchase!
The one-page mode of the theme requires the following settings:
1). Create a page that will serve the “base” for the front page and make it a “One-page” template (in the “Page Attributes” box while in the edit mode). This is required due to the way WordPress handles its front page displays.
2). In the “Settings -> Reading” admin section, choose the page you’ve created in the “Front page displays” setting.
3). In the Theme Options panel, “One-page website” tab, check the option “Activate one-page website mode” and do not forget to press the “Save All Changes” button to preserve the setting.
After these steps your front page should be displaying the one-page basis. Now you can create more pages, each with any content you like, and they will automatically be included into the front-page and the menu.
Should you have additional questions about the theme, do not hesitate to contact me!
Sincerely,
Andrii / Satori Studio