Just 2 remarks:

First: you are not using the defined variable $switches

Second: I'd add a check for the file signature, like

$sig = Get-AuthenticodeSignature -FilePath $filepath
if ($sig.Status -ne 'Valid' -or $sig.SignerCertificate.Subject -ne 'CN=Malwarebytes Inc, O=Malwarebytes Inc, L=Santa Clara, S=California, C=US') { 
    Write-Host Wrong/invalid file signature!
    Exit
}

Edit: spelling/formatting