--- a/gui/preferences.ui	2017-01-21 00:38:44.929972188 +0100
+++ b/gui/preferences.ui	2017-01-21 00:50:05.314477610 +0100
@@ -46,13 +46,6 @@
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QCheckBox" name="ignoreVersionMismatchCheck">
-          <property name="text">
-           <string>Ignore mismatch between command line and GUI version.</string>
-          </property>
-         </widget>
-        </item>
        </layout>
       </widget>
      </widget>
--- a/gui/preferences.cc	2017-01-21 00:39:20.648418701 +0100
+++ b/gui/preferences.cc	2017-01-21 00:50:33.451829352 +0100
@@ -40,7 +40,6 @@
   ui_.setupUi(this);
 
   ui_.reportStatisticsCheck->setChecked(babelData_.reportStatistics_);
-  ui_.ignoreVersionMismatchCheck->setChecked(babelData_.ignoreVersionMismatch_);
   // Because of an unfortunate bug in 1.4.0, we turn this off in 1.4.1.
   if (VERSION == QString("1.4.1"))
     babelData_.ignoreVersionMismatch_ = false;
@@ -82,7 +81,6 @@
   }
 
   babelData_.reportStatistics_ = ui_.reportStatisticsCheck->isChecked();
-  babelData_.ignoreVersionMismatch_ = ui_.ignoreVersionMismatchCheck->isChecked();
   accept();
 }
 
--- a/gui/babeldata.h	2017-01-21 00:40:03.888959247 +0100
+++ b/gui/babeldata.h	2017-01-21 00:51:05.753233149 +0100
@@ -66,7 +66,7 @@
     startupVersionCheck_(false),
     reportStatistics_(false),
     allowBetaUpgrades_(false),
-    ignoreVersionMismatch_(false),
+    ignoreVersionMismatch_(true),
     disableDonateDialog_(false),
     donateSplashed_(QDateTime(QDate(2010, 1, 1), QTime(0, 0, 0)))
   {