What CodeIgniter version does CI Wiz target?

CI Wiz targets CodeIgniter 4 exclusively. Starting from version 3.x of the tool, the generated code requires CI 4.4 or later. There is no CI 3 generation mode. If you have a CI 3 project you want to migrate, CI Wiz will not automate the migration of your existing code. What it can do is help you rebuild the data layer for CI 4 quickly — you design your schema in the new app and generate fresh CI4 MVC code from it, then port your business logic manually on top.