LXQt, not LXQT.

mainwindow.cpp

@@ -46,7 +46,7 @@ void MainWindow::on_buttonMonitorSetup_clicked()
     process->start(file);
 }
 
-void MainWindow::on_buttonLXQTConfigurationCenter_clicked()
+void MainWindow::on_buttonLXQtConfigurationCenter_clicked()
 {
     QProcess *process = new QProcess(this);
     QString file = "/usr/bin/lxqt-config";

mainwindow.h

@@ -35,7 +35,7 @@ private slots:
 
     void on_buttonMonitorSetup_clicked();
 
-    void on_buttonLXQTConfigurationCenter_clicked();
+    void on_buttonLXQtConfigurationCenter_clicked();
 
     void on_buttonContribute_clicked();
 

mainwindow.ui

@@ -38,12 +38,12 @@
        </widget>
       </item>
       <item>
-       <widget class="QPushButton" name="buttonLXQTConfigurationCenter">
+       <widget class="QPushButton" name="buttonLXQtConfigurationCenter">
         <property name="toolTip">
-         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Open up LXQT Configuration Center to change LXQt settings&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Open up LXQt Configuration Center to change LXQt settings&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
         </property>
         <property name="text">
-         <string>LXQT Configuration Center</string>
+         <string>LXQt Configuration Center</string>
         </property>
        </widget>
       </item>