If it doesn't open automatically, open File Explorer and navigate to the mounted Windows 11 .iso
Right click setup.exe > Run as administrator
After the Windows 11 installer initializes, click Next
Click Accept on the Applicable notices and license terms dialog
Click the Change what to keep text
Select Keep personal files and apps > Next NOTE: If the Keep personal files and apps option is grayed out then Windows has found a reason it can't do an in place upgrade without losing personal data and applications. Cancel out of the installer and backup personal data before trying again