It seems that you have downloaded and using our Businessweb Plus theme.
The Businessweb Plus is a free WordPress theme that using the WordPress customizer.
To customize the free theme Go to Appearance -> Customize
Please check the documentation for free theme
The PRO version of Businessweb Plus contains lots of sections in home page for creating beautiful and professional website. The BizWeb PRO theme is built in more user friendly Theme Options panel. You need to purchase the PRO theme in order to get Theme Options.