Recover OpenVPN Saved Password

Per the OpenVPN GUI source code, saved passwords are stored in the registry under HKCU\Software\OpenVPN-GUI\configs.

The Powershell script in this link gets the password for me: OpenVPN Password Recovery

The registry names on my computer are a bit different; my version:

$keys = Get-ChildItem "HKCU:\Software\OpenVPN-GUI\configs"
$items = $keys | ForEach-Object {Get-ItemProperty $_.PsPath}

foreach ($item in $items)
{
  $encryptedbytes=$item.'auth-data'
  $entropy=$item.'entropy'
  $entropy=$entropy[0..(($entropy.Length)-2)]

  $decryptedbytes = [System.Security.Cryptography.ProtectedData]::Unprotect(
    $encryptedBytes, 
    $entropy, 
    [System.Security.Cryptography.DataProtectionScope]::CurrentUser)
 
  Write-Host ([System.Text.Encoding]::Unicode.GetString($decryptedbytes))
}

You may also need to execute Add-Type -AssemblyName System.Security in Powershell to make it work.

edit: on windows 10, OpenVPN v11.9, $encryptedbytes=$item.'key-data'