Save over file with new name but delete the old one

I am looking for help creating a commandbutton that, when clicked, saves the current file with a new name. I already have this part done but I have to go back into the file folder and delete the old version of the file. I am hoping it is possible to do this while it saves the new version of the file.

Private Sub CommandButton4_Click()
'ClearEmptyNQAD
  With Application
    .DisplayAlerts = False
    .ScreenUpdating = False
    .Calculation = xlCalculationAutomatic
    .EnableEvents = False
   End With
Dim ThisFile As String
    ThisFile = Sheet8.Range("p46").Value
    Application.Dialogs(xlDialogSaveAs).Show ThisFile & ".xlsm"
   With Application
    .DisplayAlerts = True
    .ScreenUpdating = True
    .Calculation = xlCalculationAutomatic
    .EnableEvents = True
   End With
End Sub

Cell P46 is a cell that groups other cells together to get a specific name. After a person selects a checkbox it adds 1 of a possible 3 different suffixes onto the filename and saves it. The way it is set up now I will end up with 4 files in the same folder that are just the same thing only updated. I want it to delete all older versions of the file whenever it updates.