-Uninstall argument for Steam

ShareX/IntegrationHelpers.cs

@@ -98,5 +98,12 @@ public static void SteamShowInApp(bool inapp)
             MessageBox.Show(Resources.ApplicationSettingsForm_cbSteamShowInApp_CheckedChanged_For_settings_to_take_effect_ShareX_needs_to_be_reopened_from_Steam_,
                 "ShareX", MessageBoxButtons.OK, MessageBoxIcon.Information);
         }
+
+        public static void Uninstall()
+        {
+            CreateStartupShortcut(false);
+            CreateShellContextMenuButton(false);
+            CreateSendToMenuButton(false);
+        }
     }
 }

ShareX/Program.cs

@@ -253,6 +253,10 @@ private static void Main(string[] args)
             CLI = new CLIManager(args);
             CLI.ParseCommands();
 
+#if STEAM
+            if (CheckUninstall()) return; // Steam will run ShareX with -Uninstall when uninstalling
+#endif
+
             if (CheckAdminTasks()) return; // If ShareX opened just for be able to execute task as Admin
 
             IsMultiInstance = CLI.IsCommandExist("multi", "m");
@@ -571,5 +575,23 @@ private static bool CheckAdminTasks()
 
             return false;
         }
+
+        private static bool CheckUninstall()
+        {
+            if (CLI.IsCommandExist("Uninstall"))
+            {
+                try
+                {
+                    IntegrationHelpers.Uninstall();
+                }
+                catch
+                {
+                }
+
+                return true;
+            }
+
+            return false;
+        }
     }
 }