You can do it from command prompt as administrator, then reboot
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\Account" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\Applicability" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\Cache" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\ClientState" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\UI" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\Restricted" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\WindowsSelfHost\ToastNotification" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\SLS\Programs\WUMUDCat" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\SLS\Programs\RingExternal" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\SLS\Programs\RingPreview" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\SLS\Programs\RingInsiderSlow" /f
2>nul reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\SLS\Programs\RingInsiderFast" /f
2>nul reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate" /f /v BranchReadinessLevel
2>nul bcdedit /deletevalue {current} flightsigning