diff --git a/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java b/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
index 76f72d8477..504a2aea29 100644
--- a/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
+++ b/java_console/shared_io/src/main/java/com/rusefi/rusEFIVersion.java
@@ -6,7 +6,7 @@ import java.net.URL;
 import java.util.concurrent.atomic.AtomicReference;
 
 public class rusEFIVersion {
-    public static final int CONSOLE_VERSION = 20210618;
+    public static final int CONSOLE_VERSION = 20210711;
     public static AtomicReference<String> firmwareVersion = new AtomicReference<>("N/A");
 
     public static long classBuildTimeMillis() {
diff --git a/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java b/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java
index f473f4f931..b20a492430 100644
--- a/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java
+++ b/java_console/ui/src/main/java/com/rusefi/maintenance/DfuFlasher.java
@@ -8,7 +8,6 @@ import com.rusefi.autodetect.PortDetector;
 import com.rusefi.io.DfuHelper;
 import com.rusefi.io.IoStream;
 import com.rusefi.io.serial.SerialIoStreamJSerialComm;
-import com.rusefi.ui.StatusConsumer;
 import com.rusefi.ui.StatusWindow;
 import com.rusefi.ui.util.URLLabel;
 
@@ -33,15 +32,21 @@ public class DfuFlasher {
         button.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent event) {
-                doAutoDfu(comboPorts);
+                // todo: better usability would be to disable "Program" port in case of no ports found
+                Object selectedItem = comboPorts.getSelectedItem();
+                if (selectedItem == null) {
+                    JOptionPane.showMessageDialog(comboPorts, "Failed to located serial ports");
+                } else {
+                    doAutoDfu(selectedItem);
+                }
             }
         });
 
         manualButton.addActionListener(e -> runDfuProgramming());
     }
 
-    public static void doAutoDfu(JComboBox<String> comboPorts) {
-        String port = comboPorts.getSelectedItem().toString();
+    public static void doAutoDfu(Object selectedItem) {
+        String port = selectedItem.toString();
         StringBuilder messages = new StringBuilder();
 
         if (!PortDetector.isAutoPort(port)) {
diff --git a/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java b/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java
index 6529f44658..3f59f7bffa 100644
--- a/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java
+++ b/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java
@@ -56,7 +56,7 @@ public class ProgramSelector {
                 // todo: add ST-LINK no-assert mode
 
                 if (isAutoDfu) {
-                    DfuFlasher.doAutoDfu(comboPorts);
+                    DfuFlasher.doAutoDfu(comboPorts.getSelectedItem());
                 } else if (isManualDfu){
                     DfuFlasher.runDfuProgramming();
                 } else {