For better compatibility we suggest to use Artica v4.30 Service Pack 411 or above or the Hotfix 20211210 or Above for 4.30x SP206
On the left menu, select “Your System” / “Packages Center”
On the search field, type “Proxy”
If your Proxy is on 5 branch, you will see the current version on the “Proxy Service 5.x” in this case, click on “Install Or Upgrade” on the “Proxy service 4.x”
Click on “Install or Upgrade” on the desired 4.x version.