diff -r 684c6e74cc1b -r a9da2744609e src/MainWindow.cpp
--- a/src/MainWindow.cpp	Sun Feb 20 20:22:49 2022 +0100
+++ b/src/MainWindow.cpp	Mon Feb 21 21:17:33 2022 +0100
@@ -19,6 +19,7 @@
 #include "InventorySuppliers.h"
 #include "InventoryFermentables.h"
 #include "InventoryHops.h"
+#include "InventoryYeasts.h"
 #include "Setup.h"
 #include "../ui/ui_MainWindow.h"
 #include "config.h"
@@ -107,6 +108,24 @@
 }
 
 
+void MainWindow::fromInventoryYeasts()
+{
+    qDebug() << Q_FUNC_INFO;
+    delete InventoryYeastsWindow;
+    this->show();
+}
+
+
+void MainWindow::on_actionYeasts_triggered()
+{
+    qDebug() << Q_FUNC_INFO;
+    InventoryYeastsWindow = new InventoryYeasts(this);
+    QObject::connect(InventoryYeastsWindow, SIGNAL(firstWindow()), this, SLOT(fromInventoryYeasts()));
+    this->hide();    // Close the main window
+    InventoryYeastsWindow->show();  // Show a second window
+}
+
+
 void MainWindow::fromSetup()
 {
     qDebug() << Q_FUNC_INFO;