There is a feature which can be confusing if one isn't aware of it - by which the apps on the App Launcher change based on your location context. The current contexts are either "At Home", "On the Go", or "At Work".
To modify the apps for the context:
The context will switch automatically based on the location of when you first indicated 'At Work' or 'At Home'.
- Pull the launch app area up at the bottom of the screen.
- Click on edit apps and tools.
- Notice at the top of the launcher whether the context is set to "At Home", "On the Go" or "At Work".
- Modify the apps you want for each context.