diff --git a/MainForm.cs b/MainForm.cs
index 0ed09a3..5704146 100644
--- a/MainForm.cs
+++ b/MainForm.cs
@@ -83,46 +83,45 @@ namespace bzit.bomg
             this.Location = Screen.PrimaryScreen.WorkingArea.Location;
 
             // command line
-            //string[] szr = Environment.GetCommandLineArgs();
-            //int i = 0;
-            //while (true)
-            //{
-            //    if (i > (szr.Length - 1))
-            //    {
-            //        break;
-            //    }
+            string[] args = Environment.GetCommandLineArgs();
 
-            //    switch (szr[i].Trim().ToLower())
-            //    {
-            //        case "-o":
-            //        case "-open":
-            //            if ((i + 1) > (szr.Length - 1))
-            //            {
-            //                break;
-            //            }
+            if (args.Length > 1)
+            {
+                int i = 1;
+                while (true)
+                {
+                    if (i > (args.Length - 1))
+                    {
+                        break;
+                    }
 
-            //            sessionFilename = szr[(i + 1)];
+                    switch (args[i].Trim().ToLower())
+                    {
+                        case "-o":
+                        case "-open":
+                            if ((i + 1) > (args.Length - 1)) break;
 
-            //            if (string.IsNullOrEmpty(sessionFilename))
-            //            {
-            //                sessionFilename = null;
-            //                break;
-            //            }
+                            string openFilename = args[(i + 1)];
+                            if (string.IsNullOrWhiteSpace(openFilename)) break;
+                            if (!File.Exists(openFilename)) break;
 
-            //            if (!File.Exists(sessionFilename))
-            //            {
-            //                sessionFilename = null;
-            //                break;
-            //            }
+                            string openExtension = Path.GetExtension(openFilename).Trim('.');
+                            if (openExtension.Equals("jsnx", StringComparison.CurrentCultureIgnoreCase))
+                            {
+                                loadBookmarkFile(openFilename, 1);
+                            }
+                            else if (openExtension.Equals("ryz", StringComparison.CurrentCultureIgnoreCase))
+                            {
+                                loadBookmarkFile(openFilename, 2);
+                            }
 
-            //            OpenBookmarkFile(sessionFilename);
+                            i++;
+                            break;
+                    }
 
-            //            i++;
-            //            break;
-            //    }
-
-            //    i++;
-            //}
+                    i++;
+                }
+            }
         }
 
         protected override void OnFormClosing(FormClosingEventArgs e)
diff --git a/bomg.csproj b/bomg.csproj
index aa0b82b..c051be6 100644
--- a/bomg.csproj
+++ b/bomg.csproj
@@ -110,6 +110,7 @@
     </Compile>
     <Compile Include="Models\BookmarkItemModel.cs" />
     <Compile Include="RyzStudio\Net\HttpWeb.cs" />
+    <Compile Include="RyzStudio\Windows\Forms\ThreadControl.cs" />
     <Compile Include="Windows\Forms\BookmarkTreeViewSNode.cs" />
     <Compile Include="RyzStudio\Windows\Forms\HorizontalSeparator.cs">
       <SubType>UserControl</SubType>