Options for Products

Could you give more details on what is not displaying as in the demo website ?
You don't need to create any module for options.

I can see that you edited your product page layout file. Did you do that before updating from a previous version ?
Because if yes, you probably don't have the new code to handle the display of options on the product page.
You would have the delete the customization and reapply it on the new version of that view file.

In your case, you must have edited the file show of the view product.

All the view customizations are stored in templates/YOUR_TEMPLATE/html/com_hikashop