If you want to uninstall Qt but can't find the MaintenanceTool.exe file, you can follow these steps. On Windows, you can go to Control Panel, select Programs and uninstall Qt from the list. Otherwise, you can navigate to the Qt installation folder (usually C:\Qt), delete the entire folder and remove the related environment variables. On Linux, if you installed Qt via the package manager, use the command sudo apt remove qt5-default or sudo dnf remove qt5 to uninstall. If installing manually, you just need to delete the installation directory (usually /opt/Qt or ~/Qt).