#### Modify the following values as necessary
$url = "https://files.fm/down.php?i=2xyfrrqq&n=test.zip"
$outfile = "C:\tmp\test2.zip"
$extractpath = "C:\tmp\extracted"
$versionfile = "version.txt"
$installpath = "C:\tmp\installed"
$startfile = "C:\tmp\installed\application.exe"
####

### Leave these values as is
$oldversion = "0.00"
$newversion = "0.01"
$arg = ("e "+$outfile+" -o"+$extractpath)

function DownloadFile($url, $targetFile)
{
   if (Test-Path $outfile) {
    remove-item $outfile -force
   }
   $timeA = get-date
   $uri = New-Object "System.Uri" "$url"
   $request = [System.Net.HttpWebRequest]::Create($uri)
   $request.set_Timeout(15000) #15 second timeout
   $response = $request.GetResponse()
   $totalLength = [System.Math]::Floor($response.get_ContentLength()/1024)
   $responseStream = $response.GetResponseStream()
   $targetStream = New-Object -TypeName System.IO.FileStream -ArgumentList $targetFile, Create
   $buffer = new-object byte[] 10KB
   $count = $responseStream.Read($buffer,0,$buffer.length)
   $downloadedBytes = $count
   while ($count -gt 0)
   {
       $targetStream.Write($buffer, 0, $count)
       $count = $responseStream.Read($buffer,0,$buffer.length)
       $downloadedBytes = $downloadedBytes + $count
       Write-Progress -activity "Downloading file '$($url.split('/') | Select -Last 1)'" -status "Downloaded ($([System.Math]::Floor($downloadedBytes/1024))K of $($totalLength)K): " -PercentComplete ((([System.Math]::Floor($downloadedBytes/1024)) / $totalLength)  * 100)
   }
   $timeB = get-date ; $timeC = new-timespan $timeA $timeB ; $timeD = ($timeC.minutes)*60 + ($timeC.seconds)
   $filesize = (get-item $targetFile).length/1KB ; $avgspd = [math]::round(($filesize / $timeD),1)
   Write-Output "Downloaded '$($url.split('/') | Select -Last 1)' in $timeD seconds ($avgspd KB/s avg)"
   $targetStream.Flush() ; $targetStream.Close() ; $targetStream.Dispose() ; $responseStream.Dispose()
}

function RemoveLineCarriage($object)
{
    $result = [System.String] $object;
    $result = $result -replace "`t","";
    $result = $result -replace "`n","";
    $result = $result -replace "`r","";
    $result = $result -replace " ;",";";
    $result = $result -replace "; ",";";

    $result = $result -replace [Environment]::NewLine, "";

    $result;
}

DownloadFile $url $outfile
if (Test-Path $extractpath) {
  remove-item $extractpath -force -recurse
}
start-process "c:\program files\7-zip\7z.exe" $arg -wait
remove-item $outfile -force ; write-output "Deleted file: $outfile"
$oldversion = (get-content ($installpath + "\" + $versionfile) | out-string)
$newversion = (get-content ($extractpath + "\" + $versionfile) | out-string)
$oldversion = RemoveLineCarriage($oldversion)
$newversion = RemoveLineCarriage($newversion)
write-output ("Existing version is $oldversion | New version is: $newversion")
if ($oldversion -eq $newversion) {
  write-output "Version match, retaining existing files..."
    if (Test-Path $extractpath) {
        remove-item $extractpath -force -recurse
        write-output "Extracted files have been deleted"
    }
  }
else {
  write-output "Version mismatch"
    if (Test-Path $installpath) {
        remove-item $installpath -force -recurse
        write-output "Installed files have been deleted"
    }
  write-output "Moving files from $extractpath TO $installpath"
  move-item $extractpath $installpath -force
  }

write-output (""+"Running: $startfile")
start-process $startfile