fix: enhance logic to check and download the correct version of ekDNSHelper

Fix-UpdateLocalHosts.ps1

@@ -1,9 +1,27 @@
 $DNSHelper = $Global:ToolsDirectory + '\ekdns.exe'
-If ( !(Test-Path $DNSHelper) ) {
+
+$DNSHelperRequiredVersion = '2.1.0'
+$DownloadRequired = $false
+
+If (Test-Path $DNSHelper) {
+    $versionOutput = (& $DNSHelper | Select-Object -First 1)
+    If ($versionOutput -match 'v(\d+\.\d+\.\d+)') {
+        If ($Matches[1] -ne $DNSHelperRequiredVersion) {
+            $DownloadRequired = $true
+        }
+    }
+} Else {
+    $DownloadRequired = $true
+}
+
+# Download the latest version of ekDNSHelper
+If ($DownloadRequired) {
     $DNSHelperURL = 'https://www.emberkom.com/tools/ekdns-x64.exe'
     If (!(Test-Path ${Env:ProgramFiles(x86)})) {
         $DNSHelperURL = 'https://www.emberkom.com/tools/ekdns-x86.exe'
     }
+    If (Test-Path $DNSHelper) { Remove-Item -Path $DNSHelper -Force -ErrorAction SilentlyContinue }
+    Write-Output "Downloading latest version of ekDNSHelper"
     Download-File -URL $DNSHelperURL -File $DNSHelper
 }