doc: update UI tool instructions

1. Update the images to match with the latest UI.
2. Update the path of the saved XML file when clicking Export XML to
save customized file.

Signed-off-by: Kunhui-Li <kunhuix.li@intel.com>
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>

doc/tutorials/acrn_configuration_tool.rst

@@ -507,8 +507,10 @@ Instructions
    pop-up model.
 
    .. note::
-      All customized scenario XMLs will be in user-defined groups
+      Save the customized scenario XML to a specific folder by inputting the
-      located in ``misc/config_tools/data/[board]/user_defined/``.
+      absolute path to this folder in the **Scenario XML Path** field. If you
+      don't specify a path, the scenario xml file will be saved to
+      default folder: ``acrn-hypervisor/../user_config/[board]/``.
 
    Before saving the scenario XML, the configuration editor validates the
    configurable items. If errors exist, the configuration editor lists all
@@ -547,7 +549,7 @@ The **Launch Setting** is quite similar to the **Scenario Setting**:
    - Remove a UOS launch script by clicking **Remove this VM** for the
      current launch configuration.
 
-#. Save the current launch configuration to the user-defined XML files by
+#. Save the current launch configuration to the ``user_config`` XML folder by
    clicking **Export XML**. The configuration editor validates the current
    configuration and lists all incorrectly configured items.