diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlog.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlog.cpp
index 190514f..8ed6307 100644
--- a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlog.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlog.cpp
@@ -156,7 +156,7 @@ nlohmann::json DevicePacketLog::LogEntry::toJSON()
 void DevicePacketLog::LogEntry::fromJSON(nlohmann::json j)
 {
     type = QString::fromStdString(j.value("type", "")) == "Packet" ? Type::Packet : Type::InvalidBytes;
-    timestamp = QDateTime::fromMSecsSinceEpoch(j.value("timestamp", 0UL), Qt::TimeSpec::UTC);
+    timestamp = QDateTime::fromMSecsSinceEpoch(j.value("timestamp", 0ULL), Qt::TimeSpec::UTC);
     serial = QString::fromStdString(j.value("serial", ""));
     datapoint = nullptr;
     p = nullptr;
diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlogview.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlogview.cpp
index 54555eb..87fc1b5 100644
--- a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlogview.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/devicepacketlogview.cpp
@@ -28,7 +28,7 @@ DevicePacketLogView::DevicePacketLogView(QWidget *parent) :
         updateTree();
     });
     connect(ui->buttonBox->button(QDialogButtonBox::Save), &QPushButton::clicked, [=](){
-        QString filename = QFileDialog::getSaveFileName(nullptr, "Load USB log data", "", "USB log files (*.usblog)", nullptr, QFileDialog::DontUseNativeDialog);
+        QString filename = QFileDialog::getSaveFileName(nullptr, "Load LibreVNA log data", "", "LibreVNA log files (*.vnalog)", nullptr, QFileDialog::DontUseNativeDialog);
         if(filename.isEmpty()) {
             // aborted selection
             return;
@@ -42,7 +42,7 @@ DevicePacketLogView::DevicePacketLogView(QWidget *parent) :
         file.close();
     });
     connect(ui->buttonBox->button(QDialogButtonBox::Open), &QPushButton::clicked, [=](){
-        QString filename = QFileDialog::getOpenFileName(nullptr, "Load USB log data", "", "USB log files (*.usblog)", nullptr, QFileDialog::DontUseNativeDialog);
+        QString filename = QFileDialog::getOpenFileName(nullptr, "Load LibreVNA log data", "", "LibreVNA log files (*.vnalog)", nullptr, QFileDialog::DontUseNativeDialog);
         if(filename.isEmpty()) {
             // aborted selection
             return;