I currently have build 18363.10022 from the insider slow ring installed. I did try to "upgrade" to the 1909 release build 18363.418 using the 18363.418 ISO. When running the setup.exe of 18363.418, I'm not able to keep the Personal Files and Apps, because the setup complains that this is not possible when installing an older version. The setup most likely believes that I have a new build installed because the build patch number 10022 is greater than 418. I have tried to "trick" the setup by manually changing the version numbers in the registyr key (Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion) without success. I cannot go back to a previous build as I have the build from the slow ring installed for over 10 days. Any advice?