Reset default presets
Word Builder comes with many preset tile sets that can be used to support quality synthetic phonics programs such as Multilit, Jolly Phonics, Letters & Sounds, Spelfabet and Phonics Hero. You can also crerate your own tile sets, as described here. If you want to clear all the presets you have created you can restore Word Builder to the "factory default" presets. To do so:
On the Main Menu, tap the "settings" icon.
Tap the "reset saved tile sets to defaults" button.
The app will ask you to conform your decision. Tap the 'yes' button to proceed.