Editions: All 

Before deleting the state directory, please be sure that you have the correct recovery phrase. 

Note: Deleting the contents of your state directory does not delete your ada. Your ada are stored on the blockchain, not on your machine.

See also Preventing loss of ada

Delete the contents of the state directory

Windows and macOS

1. Open the state directory

2. Close the Daedalus application.

3. Delete everything in the state directory, leaving the directory empty.

4. Open Daedalus again.

Linux

1. Open the state directory

2. Close the Daedalus application.

3. Delete Folders : 
blockchain -> ~/.local/share/Daedalus/itn_rewards_v1/chain
wallets -> ~/.local/share/Daedalus/itn_rewards_v1/wallets

4. Open Daedalus again

Next Steps

Your wallets will be gone. You must Restore your wallets from your recovery phrase again.