With the release of our new game Launcher it was found that the current download page is not providing the new launcher installer due to a cache issue. If you are upgrading to the current launcher please ensure you refresh the Download page first by pressing CTRL F5 and then clicking on the download button.
If you are running the new installer and are asked to remove your current installation, you have the incorrect installer and should delete it from your PC and then refresh the download page before trying again.
More information about upgrading to our new launcher can be found HERE