diff -r f8c66edffbd4 -r 5f685bcd3ad6 dialogs/SFCDivergenceDialog.py
--- a/dialogs/SFCDivergenceDialog.py	Thu Apr 11 08:40:17 2019 +0200
+++ b/dialogs/SFCDivergenceDialog.py	Thu Apr 11 11:26:47 2019 +0200
@@ -144,7 +144,7 @@
         Called when SFC divergence type changed
         @param event: wx.RadioButtonEvent
         """
-        self.DrawPreview()
+        self.RefreshPreview()
         event.Skip()
 
     def OnSequencesChanged(self, event):
@@ -152,7 +152,7 @@
         Called when SFC divergence number of sequences changed
         @param event: wx.SpinEvent
         """
-        self.DrawPreview()
+        self.RefreshPreview()
         event.Skip()
 
     def DrawPreview(self):