61tree Installer — Free Download
Windows 10/11 · 64-bit · Microsoft Flight Simulator 2020 / 2024
Free to use · Diana 2 glider and multiplayer require a purchase
⚠️ Browser & Windows security warnings — this is normal
Because Aloft is an indie app not yet submitted to Microsoft’s signing program, Windows SmartScreen and your browser may flag the installer. It is not a virus.
To install, you may need to:
- In your browser download bar — click Keep or Keep anyway
- If a second prompt appears — click Show more → Keep anyway
- When Windows SmartScreen opens — click More info
- Then click Run anyway
These warnings appear for all unsigned indie software. The app is open to inspection — feel free to contact us if you have any questions.