Reality doesn't match instructions — Redline theme from Progression Studios

I am trying to change the background color and header information (logo, address) on the Redline theme. The theme documentation says “You can easily adjust the theme options by going under Appearance > Customize — From there you can click on headings like “Theme Settings” & “Home Settings” to adjust the theme. The logo for example is edited under “Theme Settings”.”

There IS NO Customize option under Appearance in WordPress . Appearance includes: Themes, Widgets, Menus, Install Plugins, and Editor. Editor is not the same as Customize — Editor puts you into raw CSS mode.

I cannot finish my business’s rework until I can actually add our logo and address. Please help. The address is: https://www.chisholmtrailballroom.com