If it is too difficult to make a short cut where Target = <path to where Maelstrom.exe is on your computer> and Start in = <path to where you downloaded the mod>, then you can just copy everything inside the DirectX9_64bit directory and paste it into the ERAS directory and just launch Maelstrom.exe directly by double-clicking.
However, that also means that if Maelstrom is updated with a future fix or feature, you will have to again copy it, every time.