One client, two mirrors. Grab it, extract it, create an account — you are in the game in a few minutes.
Most Windows machines already have both. Install them if the game refuses to start or closes without a message.
Antivirus software sometimes flags game .dll files as suspicious, especially right after an update. On a client downloaded from the mirrors above this is a false positive.
The fix is to exclude the game folder, then restore the file from quarantine or extract the client again.
Install DirectX and the Visual C++ Runtime from the box above — a missing runtime ends the client without a message.
If it still closes, extract the client into a folder of its own outside Program Files: Windows blocks writes there, and the game keeps its settings next to the executable.
Ask on Discord or open a ticket in the user panel. Say which step you got to and what the screen showed — that is usually enough to sort it out.