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I have a program that installs with a WiX installer. The program itself creates a number of files in the [CommonAppDataFolder]\[MyAppName]\ directory. These files all have the same extension (lets call it .dat). On upgrading , I want to retain these files. On uninstalling , I want to remove these files. I am currently deleting the files as so: <Directory Id='CommonAppDataFolder'> <Directory Id='MyCommonAppDataFolder' Name='MyAppName'> <Component Id='RemoveFilesComponent' Guid='71cb0cd8-8459-4a8f-89b7-f00977aa7b70'> <RemoveFile Id='RemoveFiles' Name='*.dat' On='uninstall'/> </Component> </Directory> </Directory> And I have this to facilitate upgrades: <InstallExecuteSequence> <RemoveExistingProducts After='InstallInitialize'/> </InstallExecuteSequence> Now, when I uninstall, the .dat files are removed correctly. However, when I upgrade, the .dat files are also removed. I guess because an upgrade is performing an uninstall on the previous version. Am I approaching this problem correctly? How can I retain the files on upgrade, while removing them on uninstall?

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