Change GUI refresh rate to 4 times per second instead of 2. The

refresh rate is purposefully limited to allow for better system
performance while capturing but 4 times per second is not really too
fast. Also updated version number

config.h

@@ -1,7 +1,7 @@
 #ifndef CONFIG
 #define CONFIG
 
-#define VERSION             170
+#define VERSION             171
 
 //try to keep this in sync.
 //SavvyCAN will complain if you connect a GVRET board with a revision

mainwindow.cpp

@@ -142,7 +142,7 @@ MainWindow::MainWindow(QWidget *parent) :
     ui->lbNumFrames->setText("0");
 
     connect(&updateTimer, &QTimer::timeout, this, &MainWindow::tickGUIUpdate);
-    updateTimer.setInterval(500); //test 250);
+    updateTimer.setInterval(250);
     updateTimer.start();
 
     elapsedTime = new QTime;