Separate Windows x64 and ARM64 builds are available on the download page.
Official source
Get the installer from maralys.com and check the selected architecture before opening it.
Three steps to play
The official installer and server guides are available in MARALYS.
01Select Windows and your architecture on the download page.
02Download and open the EXE installer.
03Sign in to MARALYS and choose a server.
Why might Windows show a warning?
The installer does not yet have a commercial code-signing certificate. If you downloaded it from maralys.com, open More info and confirm the launch. Do not run files from unknown sources.