Because TimeGate Studios went bankrupt and Games for Windows Live was discontinued, the official "download sections" for the game's executable and online services have largely vanished. Current Status: Can you still download it?
Because the official servers are dead, a dedicated group of fans (often found on Discord or Steam community hubs) maintains private servers and specific "fixed" versions of the executable to keep the game playable. Safety Warning
If you are looking for this file to play the game today, there are several hurdles:
Specific to get the game running on Windows 10/11. Information on the community-run servers currently active.