diff -r 624b9694cb0d -r 08e4394ff4fb dialogs/DiscoveryDialog.py
--- a/dialogs/DiscoveryDialog.py	Wed Aug 16 15:18:57 2017 +0300
+++ b/dialogs/DiscoveryDialog.py	Wed Aug 16 16:37:45 2017 +0300
@@ -140,11 +140,13 @@
         self.LatestSelection = None
 
     def __del__(self):
-        if self.Browser is not None: self.Browser.cancel()
+        if self.Browser is not None:
+            self.Browser.cancel()
         self.ZeroConfInstance.close()
 
     def RefreshList(self):
-        if self.Browser is not None: self.Browser.cancel()
+        if self.Browser is not None:
+            self.Browser.cancel()
         self.Browser = ServiceBrowser(self.ZeroConfInstance, service_type, self)
 
     def OnRefreshButton(self, event):