How can I load the selected XML File (Selected from a Listview) into the correct Textboxes?

Question

Right, so I have a windowsform with lots of Textboxes, where the user can type in Information, and then hit "Save", once its saved it goes into a sortof XML Format 
<?xml version="1.0" encoding="utf-8"?>
<!--Database-->
<Case>
  <Person>l<Driver></Driver><License-Holder></License-Holder><Address></Address><Phone></Phone><Date-of-Birth></Date-of-Birth><Registration></Registration>
Like that.
Now, on my Startup Form (The main form) there is a Listview that I gave the name Objectlist1. This list displays ANY file located in a specific folder on my computer. This is also where the Saved files appear.
The list also updates every 5th second so after you save it appears quickly.
Now, the Files are saved using the content or Value of the first Textbox:
Dim XmlWrt As XmlWriter = XmlWriter.Create("C:\Users\USER\Desktop\TESTFOLDER\" + Firsttextbox.Text, settings)
So it appears in the folder and on the list with the value inserted in the first Textbox.
My problem comes when I want to load this back (Or reverse the function if you will)
Where I can go to the Objectlist1/Listview, either doubleclick a file or Mark a file, and hit my button "Retrieve"
I want the Form where you could input all the values to show - which it does
And the information from the XML/File saved to appear where it once was typed or inserted.
Here is an example of the code used to save the values from the Textboxes;
Private Sub Savebutton_Click(sender As Object, e As EventArgs) Handles Savebutton.Click
        If IO.File.Exists(Pholderbox.Text) = False Then
            Dim settings As New XmlWriterSettings()
            settings.Indent = True
            Dim XmlWrt As XmlWriter = XmlWriter.Create("C:\Users\USER\Desktop\TESTFOLDER\" + Pholderbox.Text, settings)
            With XmlWrt
                ' Write the Xml declaration.
                .WriteStartDocument()
                ' CLIENT
                ' Write a comment.
                .WriteComment("Database")
                ' Write the root element.
                .WriteStartElement("Case")
                ' Start our first person.
                .WriteStartElement("Person")
                .WriteString(Textbox1.Text)
                ' The person nodes.
                .WriteStartElement("Driver")
                .WriteString(Textbox2.Text)
                .WriteEndElement()
I've tried multiple codesamples but they all give either "XML Not found" or such Overloads.
This is the current code I used when trying to make it work
Private Function ReadSettingsXML(ByVal path As String) As MySettings # On Debug It marks here and tells me it wasn't found.
        Dim thisSettingsInfo As New MySettings
        If My.Computer.FileSystem.FileExists(Objectlist1.SelectedItems.ToString) Then
            Dim settingsInfo = XElement.Load(Objectlist1.SelectedItems.ToString)
            If settingsInfo IsNot Nothing Then
                For Each mainGroup As XElement In settingsInfo.Elements
                    If mainGroup.Name = "<Database>" AndAlso mainGroup.HasElements Then
                        For Each subGroup As XElement In mainGroup.Elements
                            If subGroup.Name = "<Person>" Then
                                thisSettingsInfo.Textbox1 = subGroup.Value
                            ElseIf subGroup.Name = "<Driver>" Then
                                thisSettingsInfo.Textbox2 = subGroup.Value
                            ElseIf subGroup.Name = "<Address>" Then
                                thisSettingsInfo.Textbox3 = subGroup.Value
                            End If
                        Next
                    End If
                Next
            Else
                thisSettingsInfo = Nothing
                Throw New Exception("The settings XML file is corrupt and cannot be read.")
            End If
        Else
            thisSettingsInfo = Nothing
            Throw New Exception("The settings XML file could not be located.")
        End If
        Return thisSettingsInfo
    End Function
    Private Sub LoadXML_Click(sender As Object, e As EventArgs) Handles LoadXML.Click
        Dim settings As New MySettings
        settings = ReadSettingsXML(Objectlist1.SelectedItems.ToString)
        If settings IsNot Nothing Then
            Dim sb As New System.Text.StringBuilder
            With settings
                Caseworker.Textbox1.Text = .Person
                Caseworker.Textbox2.Text = .Driver
                Caseworker.Textbox3.Text = .Address
            End With
        End If
    End Sub
Also, the "Caseworker" is the form where all the textboxes are located.
Been stuck on this for two working days, so any help is highly appreciated 
Codesamples are also highly welcome so I can see what the heck you did and find and answer to my problems.

Answer 1

I found a code that might be close to what I'm looking, but as of this code used here, it looks for a static document that already exist and is located in the code.
See this one here, checks for the XML file, and since I can't link one program to 1 file, when its gonna have and use 100's of files.
        If (IO.File.Exists("MyXML.xml")) Then
            Same here with the static document.
            Dim document As XmlReader = New XmlTextReader("MyXML.xml")
            While (document.Read())
                Dim type = document.NodeType
                'if node type was element
                If (type = XmlNodeType.Element) Then
                    If (document.Name = "FirstName") Then
                        TextBox1.Text = document.ReadInnerXml.ToString()
                    End If
                    If (document.Name = "LastName") Then
                        TextBox2.Text = document.ReadInnerXml.ToString()
                    End If
                End If
            End While
Am I at least close here, people? 
Can anyone help with the now critical issue I got?
I basically need to change these two;
 If (IO.File.Exists("MyXML.xml")) Then
            Same here with the static document.
            Dim document As XmlReader = New XmlTextReader("MyXML.xml")
To whatever value, so they read from the file SELECTED in my Listview
Cos the program saves files according to the info inserted in textboxes, so it can have whatever name you can think of, I need the program to "find and load" that file, once its selected, and then once I hit Retrieve or LOAD or whatever button, it
injects the info from the File to the correct Textboxes.
And I think this will work to get the info in the right boxes;
 If (document.Name = "FirstName") Then
                        TextBox1.Text = document.ReadInnerXml.ToString()
                    End If
                    If (document.Name = "LastName") Then
                        TextBox2.Text = document.ReadInnerXml.ToString()
Any good advise? I'm stranded here.