diff --git a/src/download_thread.cpp b/src/download_thread.cpp
index 5f430bb..f82c8fd 100644
--- a/src/download_thread.cpp
+++ b/src/download_thread.cpp
@@ -104,9 +104,9 @@ void DownloadThread::run() {
 
     m_hw->dcDownloadRequestAck();
 
-    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                 << "DownloadThread::run(): DOWNLOAD THREAD STARTED:";
-    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                 << "               DownloadThread::run(): Filename:" << m_hw->dcDownloadFileName();
 
     // load binary device controller file into memory
@@ -118,9 +118,9 @@ void DownloadThread::run() {
         // fill last block of data to be sent with 0xFF
         ba = ba.leftJustified(totalBlocks*64, (char)(0xFF));
 
-        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                     << "DownloadThread::run(): TOTAL NUMBER OF BYTES TO SEND TO DC" << ba.size();
-        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                     << "DownloadThread::run(): TOTAL NUMBER OF BLOCKS" << totalBlocks;
 
         m_hw->dc_autoRequest(true); // turn auto-request setting on
@@ -131,70 +131,46 @@ void DownloadThread::run() {
 
         resetDeviceController();
 
-        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                     << "DownloadThread::run(): RESET DEVICE-CONTROLLER";
         QThread::sleep(1);
 
         if (startBootloader()) {
-            qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+            qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                         << "DownloadThread::run(): STARTED BOOT-LOADER";
 
             m_hw->dc_autoRequest(false);// turn auto-request setting off for
                                         // download of binary dc
-#if 0
-            int currentBlock = 0;       // download of binary dc
-            DownloadResult res = DownloadResult::OK;
-            qCritical() << "64-byte block " << currentBlock;
-            while (res != DownloadResult::ERROR &&  currentBlock < totalBlocks) {
-                if ((res = sendNextAddress(currentBlock)) != DownloadResult::ERROR) {
-                    if ((res = sendNextDataBlock(ba, currentBlock)) != DownloadResult::ERROR) {
-                        m_hw->dcDownloadSetCurrentBlockNumber(currentBlock);
-                        currentBlock += 1;
-                    }
-                }
-            }
-
-            qCritical() << "DownloadThread::run(): last 64-byte block %04d" << currentBlock;
-
-            int const rest = ba.size() % 64;
-            int const offset = ba.size() - rest;
-            char const *startAddress = ba.constData() + offset;
-
-            if (rest > 0) {
-                // SHOULD NEVER HAPPEN !!!
-                uint8_t local[66];
-                memset(local, 0xFF, sizeof(local));
-                memcpy(local, startAddress, rest);
-                qCritical() << "DownloadThread::run(): ERROR SEND REMAINING" << rest << "BYTES";
-                m_hw->bl_sendDataBlock(64, local);
-            } else {
-                m_hw->bl_sendLastBlock();
-                m_hw->dcDownloadSetCurrentBlockNumber(currentBlock);
-
-                qCritical() << "DownloadThread::run(): currentBlockNumber" << currentBlock;
-                // QThread::msleep(250);
-            }
-            qCritical() << "DownloadThread::run(): last result" << (int)sendStatus(m_hw->bl_wasSendingDataOK());
-#else
             for (uint16_t currentBlock = 0; currentBlock <= totalBlocks; ++currentBlock) {
                 m_hw->dcDownloadSetCurrentBlockNumber(currentBlock);
                 qCritical() << "DownloadThread::run(): currentBlockNumber" << currentBlock;
                 QThread::msleep(250);
             }
-#endif
             m_hw->dc_autoRequest(true); // turn auto-request setting on again
         }
+
         stopBootloader();   // there is no harm in stopping the bootloader even
                             // if it was not started at all
-        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
+        qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODateWithMs)
                     << "DownloadThread::run(): STOPPED BOOT-LOADER";
     }
+#endif
 
     m_hw->dcDownloadSetRunning(false);
     m_hw->dcDownloadSetFinished(true);
 
-    qCritical() << QDateTime::currentDateTime().time().toString(Qt::ISODate)
-                << "DOWNLOAD THREAD FINISHED";
+    QDateTime const end = QDateTime::currentDateTime();
+    quint64 secs = start.secsTo(end);
+    QString runtime;
+    if (secs % 60) {
+        runtime = QString("%1min %2s").arg(secs / 60).arg(secs % 60);
+    } else {
+        runtime = QString("%1min").arg((secs / 60) + 1);
+    }
+
+    qCritical() << end.time().toString(Qt::ISODateWithMs)
+                << QString("DOWNLOAD THREAD FINISHED (RUNTIME %1)")
+                   .arg(runtime);
 
     // the object deletes itself ! This is the last line in run().
     // Never touch the object after this statement