Fixed. sorry about that, filename mismatch between the HTML and what was on the server.
Direct links:
Linux AppImage:
https://lmim.tech/downloads/LMIM_OS_v1.0.0.AppImage
Windows installer:
https://lmim.tech/downloads/LMIM_OS_Setup_v1.0.0.exe
Linux one-liner:
wget
https://lmim.tech/downloads/LMIM_OS_v1.0.0.AppImage && chmod +x LMIM_OS_v1.0.0.AppImage && ./LMIM_OS_v1.0.0.AppImage