I need help in VB.NET

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VB

Visual-Studio

accidentally i set My.Setting in Visual Studio App Setting now i want to remove but failed i also delete it from setting section but still my changes in software not showing.i applied this setting..please help me out.

Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        'My.Settings.TrialActive = True
        'My.Settings.StartDate = Date.Today
        'My.Settings.TrialUsed = False
        'My.Settings.Save()
        MsgBox("Trail Extended Successfully")
    End Sub
    Private Sub checkdate()
        Dim dt As Date = My.Settings.StartDate
        Dim days As Double = (Date.Now.AddDays(-1).Subtract(dt)).TotalDays
        If days <= 0 Then
            My.Settings.TrialActive = True
            My.Settings.Save()
            'MsgBox("This Is Trail Version")
        Else
            My.Settings.TrialActive = False
            My.Settings.TrialUsed = True
            My.Settings.Save()
            MsgBox("Your Registration hasbeen Expire!")

        End If

What I have tried:

My.Settings.Reset()
My.Settings.Save()