diff --git a/Client/Browser_Tools/BrowserJSObject.cs b/Client/Browser_Tools/BrowserJSObject.cs
index ca800fc3..05205eb6 100644
--- a/Client/Browser_Tools/BrowserJSObject.cs
+++ b/Client/Browser_Tools/BrowserJSObject.cs
@@ -27,7 +27,7 @@ namespace Active_Client.Browser_Tools
         // The first letter of All PUBLIC Variables and Methods must be Lower-Case (CEF Settings)
 
         private MainForm mainForm;
-        private static readonly string[] _validExtensions = { "", ".txt", ".cnc", ".ini", ".mpf", ".spf", /*".job", ".zip"*/ };
+        private static readonly string[] _validExtensions = { "", ".txt", ".cnc", ".cn", ".cno", ".ini", ".mpf", ".spf", /*".job", ".zip"*/ };
         private static readonly string[] _validImages = { ".jpg", ".jpeg", ".png" };
         private static string jobPath = "";
 
diff --git a/Step/wwwroot/src/services/hub.ts b/Step/wwwroot/src/services/hub.ts
index bfa7ab25..06e67093 100644
--- a/Step/wwwroot/src/services/hub.ts
+++ b/Step/wwwroot/src/services/hub.ts
@@ -432,7 +432,7 @@ export class Hub {
   }
 
   public QuitServerApp() {
-    this._hub.server.quitServerApp();
+    try { this._hub.server.quitServerApp(); } catch (err) { }
   }
   
   public Hello() {