Use installation package for directory determination.

internal/runners/clean/run_win.go

@@ -120,7 +120,10 @@ func removeInstall(logFile string, params *UninstallParams, cfg *config.Instance
 	// Schedule removal of the entire branch name directory.
 	// This is because Windows often thinks the installation.InstallDirMarker and
 	// constants.StateInstallerCmd files are still in use.
-	branchDir := filepath.Dir(filepath.Dir(stateExec))
+	branchDir, err := installation.InstallPathFromExecPath()
+	if err != nil {
+		return errs.Wrap(err, "Could not get installation path")
+	}
 	paths := []string{stateExec, branchDir}
 	if params.All {
 		paths = append(paths, cfg.ConfigPath()) // also remove the config directory