diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -18,6 +18,7 @@
 */
 #include "mainwindow.h"
 #include <dialogs/profilesdialog.h>
+#include <dialogs/choosefiledialog.h>
 #include <KLocalizedString>
 #include <KStandardAction>
 #include <KActionCollection>
@@ -86,13 +87,32 @@
     auto newInstanceWidget = new AtCoreInstanceWidget();
     QString name = QString::number(m_instances->addTab(newInstanceWidget, i18n("Connect a printer")));
     newInstanceWidget->setObjectName(name);
-    newInstanceWidget->setOpenFiles(m_openFiles);
+    newInstanceWidget->setFileCount(m_openFiles.size());
     connect(this, &MainWindow::profilesChanged, newInstanceWidget, &AtCoreInstanceWidget::updateProfileData);
     connect(newInstanceWidget, &AtCoreInstanceWidget::requestProfileDialog, [ this ] {
         std::unique_ptr<ProfilesDialog> pd(new ProfilesDialog);
         pd->exec();
         emit(profilesChanged());
     });
+
+    connect(newInstanceWidget, &AtCoreInstanceWidget::requestFileChooser, [ newInstanceWidget, this ] {
+        switch (m_openFiles.size()){
+            case 0:
+                QMessageBox::warning(this, i18n("Error"),
+                                     i18n("There's no GCode File open. \n Please select a file and try again."),
+                                     QMessageBox::Ok);
+                break;
+            case 1:
+                newInstanceWidget->printFile(m_openFiles.at(0));
+                break;
+            default:
+                ChooseFileDialog dialog(this,m_openFiles);
+                if(dialog.exec() == QDialog::Accepted){
+                    newInstanceWidget->printFile(dialog.choosenFile());
+                }
+        }
+    });
+
     connect(newInstanceWidget, &AtCoreInstanceWidget::connectionChanged, this, &MainWindow::atCoreInstanceNameChange);
 
     if(m_instances->count() > 1) {
@@ -203,7 +223,7 @@
 
         for(int i=0; i < tabs; ++i){
             auto instance = qobject_cast<AtCoreInstanceWidget*>(m_instances->widget(i));
-            instance->setOpenFiles(m_openFiles);
+            instance->setFileCount(m_openFiles.size());
         }
     }
 }
diff --git a/src/widgets/atcoreinstancewidget.h b/src/widgets/atcoreinstancewidget.h
--- a/src/widgets/atcoreinstancewidget.h
+++ b/src/widgets/atcoreinstancewidget.h
@@ -53,21 +53,22 @@
     ~AtCoreInstanceWidget();
     void startConnection(const QString& serialPort, const QMap<QString, QVariant>& profile);
     bool connected();
-    void setOpenFiles(const QList<QUrl>& files);
+    void setFileCount(int count);
 
 public slots:
     void updateProfileData();
+    void printFile(const QUrl& fileName);
 
 private:
     AtCore m_core;
+    int m_fileCount;
     QToolBar *m_toolBar;
     QComboBox *m_comboPort;
     QComboBox *m_comboProfile;
     QPushButton *m_connectButton;
     QToolBar *m_connectToolBar;
     QWidget *m_connectWidget;
     QMap<QString, QVariant> profileData;
-    QList<QUrl> m_files;
     QAction *m_printAction;
     QAction *m_stopAction;
     QSettings m_settings;
@@ -83,7 +84,6 @@
     SdWidget *m_sdWidget;
     StatusWidget *m_statusWidget;
     void initConnectsToAtCore();
-    void printFile(const QUrl& fileName);
     void pausePrint();
     void stopPrint();
     void disableMotors();
@@ -101,4 +101,5 @@
     void disableDisconnect(bool b);
     void extruderCountChanged(int count);
     void requestProfileDialog();
+    void requestFileChooser();
 };
diff --git a/src/widgets/atcoreinstancewidget.cpp b/src/widgets/atcoreinstancewidget.cpp
--- a/src/widgets/atcoreinstancewidget.cpp
+++ b/src/widgets/atcoreinstancewidget.cpp
@@ -22,16 +22,15 @@
 #include <AtCore/SerialLayer>
 #include <AtCore/GCodeCommands>
 #include <KLocalizedString>
-#include "choosefiledialog.h"
 
 AtCoreInstanceWidget::AtCoreInstanceWidget(QWidget *parent):
     QWidget(parent),
+    m_fileCount(0),
     m_toolBar(nullptr),
     m_printAction(nullptr),
     m_stopAction(nullptr)
 {
     m_theme = palette().text().color().value() >= QColor(Qt::lightGray).value() ? QString("dark") : QString("light") ;
-
     QHBoxLayout *HLayout = new QHBoxLayout;
     m_bedExtWidget = new BedExtruderWidget;
     HLayout->addWidget(m_bedExtWidget);
@@ -150,7 +149,7 @@
     connect(disableMotorsAction, &QAction::triggered, this, &AtCoreInstanceWidget::disableMotors);
     m_toolBar->addAction(disableMotorsAction);
 
-    togglePrintButtons(m_files.size());
+    togglePrintButtons(m_fileCount);
 }
 
 void AtCoreInstanceWidget::buildConnectionToolbar()
@@ -334,23 +333,11 @@
     }
 }
 
-void AtCoreInstanceWidget::print(){
-    switch (m_files.size()){
-        case 0:
-            QMessageBox::warning(this, i18n("Error"),
-                                 i18n("There's no GCode File open. \n Please select a file and try again."),
-                                 QMessageBox::Ok);
-            break;
-        case 1:
-            printFile(m_files.at(0));
-            break;
-        default:
-            auto dialog = new ChooseFileDialog(this, m_files);
-            if(dialog->exec() == QDialog::Accepted){
-                    printFile(dialog->choosenFile());
-            }
-    }
+void AtCoreInstanceWidget::print()
+{
+    emit (requestFileChooser());
 }
+
 void AtCoreInstanceWidget::pausePrint()
 {
     if(m_core.state() == AtCore::BUSY) {
@@ -497,10 +484,10 @@
     return (m_core.state() != AtCore::DISCONNECTED);
 }
 
-void AtCoreInstanceWidget::setOpenFiles(const QList<QUrl>& files)
+void AtCoreInstanceWidget::setFileCount(int count)
 {
-    m_files = files;
-    togglePrintButtons(m_files.size());
+    m_fileCount = count;
+    togglePrintButtons(m_fileCount);
 }
 
 void AtCoreInstanceWidget::updateSerialPort(const QStringList &ports)