Go to terminal/cmd/Powershell/gitbash or anyother console tool and type:
$ php BoosterCLI make:view users/index
Now go to:
resources/Views/modules/users/
Then you will find index.php file, you don´t need to add extentions in any helper, and BoosterCLI support creating a view with folders and subfolders like in this case "users/" is the subfolder of modules and "index" is the name of the current view, but you could still creating more subfolders, and if its created you could add more views to subfolder just with include it on path to the view like this: