(GH-969) Remove double choco folder if file exists

Only remove the file path from the double chocolatey folder in the temp
directory when a file exists at that location.

src/chocolatey.resources/helpers/functions/Install-ChocolateyInstallPackage.ps1

@@ -202,9 +202,13 @@ Pro / Business supports a single, ubiquitous install directory option.
   $overrideArguments = $env:chocolateyInstallOverride;
 
   # remove \chocolatey\chocolatey\
+  # might be a slight issue here if the download path is the older
   $silentArgs = $silentArgs -replace '\\chocolatey\\chocolatey\\', '\chocolatey\'
   $additionalInstallArgs = $additionalInstallArgs -replace '\\chocolatey\\chocolatey\\', '\chocolatey\'
-  $file = $file -replace '\\chocolatey\\chocolatey\\', '\chocolatey\'
+  $updatedFilePath = $file -replace '\\chocolatey\\chocolatey\\', '\chocolatey\'
+  if ([System.IO.File]::Exists($updatedFilePath)) { 
+    $file = $updatedFilePath
+  }
 
   $workingDirectory = Get-Location
   try {