Use custom exception for replay creation failures

renderdocui/Windows/Dialogs/LiveCapture.cs

@@ -169,7 +169,7 @@ namespace renderdocui.Windows
                 }
                 else
                 {
-                    throw new ApplicationException();
+                    throw new ReplayCreateException(ReplayCreateStatus.NetworkIOFailed);
                 }
 
                 while (m_Connection.Connected)
@@ -264,7 +264,7 @@ namespace renderdocui.Windows
                     ConnectionClosed();
                 });
             }
-            catch (ApplicationException)
+            catch (ReplayCreateException)
             {
                 this.BeginInvoke((MethodInvoker)delegate
                 {

renderdocui/Windows/Dialogs/RemoteManager.cs

@@ -170,9 +170,12 @@ namespace renderdocui.Windows.Dialogs
                 SetRemoteServerLive(node, true);
                 server.ShutdownConnection();
             }
-            catch (ApplicationException)
+            catch (ReplayCreateException ex)
             {
-                SetRemoteServerLive(node, false);
+                if(ex.Status == ReplayCreateStatus.NetworkRemoteBusy)
+                    SetRemoteServerLive(node, true);
+                else
+                    SetRemoteServerLive(node, false);
             }
 
             StaticExports.EnumerateRemoteTargets(hostname, (UInt32 i) => {
@@ -204,7 +207,7 @@ namespace renderdocui.Windows.Dialogs
 
                     conn.Shutdown();
                 }
-                catch (ApplicationException)
+                catch (ReplayCreateException)
                 {
                 }
             });