Fixed!
Dim rdr4 As New IO.StreamReader(Application.StartupPath & "\LumiaBrowser3_Settings5.lbrst")
Dim t As String = rdr4.ReadLine
rdr4.Close()
If t = "GlassYHnVGTghXY7VFG5g6Y78j" Then
BStyleG.Checked = True
BStyleI.Checked = False
TextBoxX4.Enabled = False
ButtonX8.Enabled = False
IsBackImage = False
Else
TextBoxX4.Enabled = True
ButtonX8.Enabled = True
BStyleI.Checked = True
BStyleG.Checked = False
TextBoxX4.Text = t
BackImage = Image.FromFile(TextBoxX4.Text)
ThemePictureBox.Image = BackImage
IsBackImage = True
End If
rdrTST.Close()