How do I uninstall RJL System Cleaner?

If you used portable mode (the default), just delete the RJLSystemCleaner.exe file. You may also want to delete the settings.ini and Logs folder next to it if they exist. Nothing else is left behind -- no registry entries, no services, no system files.

If you used installed mode (settings stored in %APPDATA%), also delete this folder:

%APPDATA%\RJL Software\System Cleaner\

To find this folder, press Win+R, type %APPDATA%\RJL Software and press Enter. Delete the "System Cleaner" folder.

That is the complete uninstall. There is no uninstaller because there is nothing complex to undo.