Ensure that the StoreFront Management console is closed
Open a PowerShell command prompt as an Administrator
From prompt C:>
Type C:Program FilesCitrixReceiver StoreFrontScriptsImportModules.ps1
After the modules are imported run Clear-DSConfiguration
When you have run the command and it has completed successfully, open the StoreFront Management console and confirm that all settings are reset. The option to Create a new deployment or Join existing server group will now be available