I tried the old way on Sierra...
How to Reset Launchpad Layout in MacOS Sierra, El Capitan
How to Reset Launchpad Layout in MacOS Sierra, El Capitan
- Open the Terminal application and enter the following defaults write command string:
defaults write com.apple.dock ResetLaunchPad -bool true; killall Dock
- Hit return and wait for the Dock to relaunch and Launchpad to reset