diff -Naur pcmanfm-qt-0.15.1_orig/pcmanfm/mainwindow.cpp pcmanfm-qt-0.15.1/pcmanfm/mainwindow.cpp
--- pcmanfm-qt-0.15.1_orig/pcmanfm/mainwindow.cpp       2020-05-17 11:31:18.000000000 +0600
+++ pcmanfm-qt-0.15.1/pcmanfm/mainwindow.cpp    2020-06-17 14:03:00.102470241 +0600
@@ -136,16 +136,6 @@
     // setup user interface
     ui.setupUi(this);
 
-    // add a warning label to the root instance
-    if(geteuid() == 0) {
-        QLabel *warningLabel = new QLabel(tr("Root Instance"));
-        warningLabel->setAlignment(Qt::AlignCenter);
-        warningLabel->setTextInteractionFlags(Qt::NoTextInteraction);
-        warningLabel->setStyleSheet(QLatin1String("QLabel {background-color: #7d0000; color: white; font-weight:bold; border-radius: 3px; margin: 2px; padding: 5px;}"));
-        ui.verticalLayout->addWidget(warningLabel);
-        ui.verticalLayout->setStretch(0, 1);
-    }
-
     splitView_ = path && settings.splitView(); // splt view needs a path
 
     // hide menu items that are not usable