Notify about JTX data not supported

companion/src/mdichild.cpp

@@ -1457,6 +1457,23 @@ bool MdiChild::convertStorage(Board::Type from, Board::Type to, bool newFile)
 {
   QMessageBox::StandardButtons btns;
   QMessageBox::StandardButton dfltBtn;
+
+  if (from == Board::BOARD_X10 && to == Board::BOARD_JUMPER_T16) {
+    QMessageBox msgBox;
+    msgBox.setWindowTitle(tr("WARNING"));
+    msgBox.setText(tr("<p>Due to the way Jumper have handled their JumperTX fork and firmware releases data integrity for settings from JumperTX cannot be trusted when migrating to OpenTX.</p> \
+                      <p>Importing JumperTX data into OpenTX 2.3 is <b>not supported and dangerous.</b></p> \
+                      <p>It is unfortunately not possible for us to differentiate JumperTX data from legitimate FrSky X10 data, but <b>You should only continue here if the file you opened comes from a real FrSky X10.</b></p> \
+                      <p>Do you really want to continue?</p>"));
+    msgBox.setIcon(QMessageBox::Warning);
+    msgBox.addButton(QMessageBox::No);
+    msgBox.addButton(QMessageBox::Yes);
+    msgBox.setDefaultButton(QMessageBox::No);
+
+    if (msgBox.exec() == QMessageBox::No)
+      return false;
+  }
+
   QString q = tr("<p><b>Currently selected radio type (%1) is not compatible with file %3 (from %2), models and settings need to be converted.</b></p>").arg(Boards::getBoardName(to)).arg(Boards::getBoardName(from)).arg(userFriendlyCurrentFile());
   if (newFile) {
     q.append(tr("Do you wish to continue with the conversion?"));