Index: /trunk/src/VBox/Frontends/VirtualBox/src/wizards/importappliance/UIFormEditorWidget.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/wizards/importappliance/UIFormEditorWidget.cpp	(revision 78243)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/wizards/importappliance/UIFormEditorWidget.cpp	(revision 78244)
@@ -726,7 +726,14 @@
 void UIFormEditorModel::updateGeneration()
 {
-    foreach (UIFormEditorRow *pRow, m_dataList)
+    for (int i = 0; i < m_dataList.size(); ++i)
+    {
+        UIFormEditorRow *pRow = m_dataList.at(i);
         if (pRow->isGenerationChanged())
+        {
             pRow->updateValueCells();
+            const QModelIndex changedIndex = index(i, 1);
+            emit dataChanged(changedIndex, changedIndex);
+        }
+    }
 }