✈️ AeroTuneMFS — Intelligent Performance Optimization & System Health Platform for MSFS 2020 & 2024

AeroTuneMFS is an intelligent, AI-assisted performance companion for Microsoft Flight Simulator 2020 and 2024.

Designed around a smoothness-first philosophy, AeroTune continuously monitors your simulator and system performance, dynamically adjusting key graphics settings such as Terrain LOD (TLOD), Object LOD (OLOD), Cloud Quality, and Shadow Quality in real time.

Unlike traditional FPS-focused tuning tools, AeroTune makes decisions based on actual system conditions including CPU load, GPU load, VRAM pressure, frametime stability, altitude, AGL (Above Ground Level), and flight phase awareness.

The goal is simple:

→ Smoothness first
→ Stability second
→ Visual quality third

AeroTune helps deliver more consistent performance where it matters most — busy airports, departures, arrivals, and long-haul flights.

With v2.0.0, AeroTune introduces significant improvements to frametime stability monitoring, flight-phase awareness, CPU bottleneck detection, memory protection, telemetry systems, and the expanding Pro analysis platform.

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⭐ Key Features

Core Engine (Free)

• Intelligent real-time tuning of TLOD, OLOD, Clouds, and Shadows
• Flight-phase aware optimisation (ground, climb, cruise, descent, approach)
• High-Altitude TLOD Boost with gradual quality restoration
• Independent OLOD mode with airport awareness
• PresentMon-based frametime stability monitoring
• CPU render-thread bottleneck awareness
• Optional ML-based stutter detection
• Emergency VRAM protection and recovery
• Self-Calibration system
• Advanced memory validation and protection
• Multi-backend GPU telemetry (NVML, DXGI, ADLX, PowerShell and more)
• Lightweight overlay with live tuning feedback
• Auto-start with Microsoft Flight Simulator
• Automatic updates (stable and beta channels)
• Presets with share codes

🆕 Pro Platform

• System Health reports with detailed performance breakdowns
• AI-assisted Log Analyser
• Graph-based analytics (CPU, GPU, VRAM, stability trends)
• Session history and performance insights
• Decision transparency and tuning explanations
• Bottleneck analysis and recommendations
• Future advanced diagnostic and analysis tools

Pro remains completely optional.

Core real-time optimisation is fully available without Pro.

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🧠 How AeroTune Works

• Monitors CPU, GPU, RAM, and VRAM pressure
• Tracks frametime stability and frame pacing consistency
• Detects instability, stutters, bottlenecks, and memory pressure
• Applies small, reversible tuning adjustments
• Learns your system's stable operating envelope
• Uses flight-phase awareness to avoid risky changes
• Prioritises long-term smoothness over short-term FPS spikes

This conservative approach helps reduce oscillation, unnecessary setting changes, and visual popping while maintaining stable simulator performance.

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📦 Installation

1. Download and run the AeroTune installer
2. Follow the setup wizard (default location recommended)
3. Launch Microsoft Flight Simulator
4. Launch AeroTuneMFS
5. Right-click the AeroTune tray icon to access settings and controls

⚠️ For memory-write features (TLOD, OLOD, Cloud and Shadow tuning), AeroTune should be run as Administrator.

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🔑 First Run & Activation

AeroTune includes a free core experience.

On first launch you will activate AeroTune using a free API key which enables:

• Secure memory detection
• Cloud-assisted memory protection
• Updates and platform services
• Telemetry and compatibility services

Optional:

Upgrade to Pro to unlock System Health reports, Log Analysis, performance analytics, and advanced insights.

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⚠️ Important Memory Cache Update (v2.0.0)

This release includes major improvements to memory detection safety and validation.

Before launching AeroTune v2.0.0 for the first time:

• Delete your existing AeroTune memory cache - This usually resolves to: C:\Users<YourUsername>\AppData\Roaming\AeroTune\ - Then delete the file: addr_cache.json
• AeroTune will automatically rebuild and validate a new cache
• The first startup after updating may take longer than normal

This ensures the new memory detection system starts with a clean validated cache and avoids potential issues caused by older cached data.

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🛠 Troubleshooting

"Waiting for Microsoft Flight Simulator..."

→ Normal while AeroTune is waiting for MSFS to launch or become ready.

"Waiting for Ready-to-Fly"

→ AeroTune is waiting until the simulator has fully loaded into a valid flight session before making tuning decisions.

GPU or VRAM shows 0%

→ Try switching the GPU telemetry backend within AeroTune settings. Some AMD systems may require alternative telemetry backends.

High VRAM Warning

→ AeroTune has detected elevated VRAM pressure and may temporarily pause increases or reduce settings to protect smoothness.

Frametime Guard Reducing TLOD

→ AeroTune has detected unstable frame pacing or rendering pressure. This can occur even when GPU or VRAM utilisation appears relatively low.

CPU Limit / CPU-Bound Warning

→ AeroTune has detected a likely CPU render-thread bottleneck. In this situation reducing TLOD often improves smoothness more effectively than GPU-focused adjustments.

High-Altitude Boost Not Activating

→ AeroTune may be waiting for stable cruise conditions, cooldown timers, or safe VRAM headroom before increasing TLOD.

TLOD/OLOD Not Increasing

→ AeroTune may be holding settings due to VRAM pressure, CPU bottlenecks, recent stutters, frametime instability, or flight-phase safety logic.

Clouds or Shadows Not Changing

→ AeroTune may not have detected those memory addresses for your current simulator build. AeroTune will safely continue using available controls.

PresentMon Telemetry Unavailable

→ AeroTune uses PresentMon for advanced frametime and GPU telemetry. Running multiple applications that attempt to control PresentMon simultaneously (such as CapFrameX recording sessions or other PresentMon-based tools) may cause telemetry conflicts. Temporarily disable PresentMon telemetry within AeroTune when performing external benchmarking.

Sim Disconnect

→ Use the AeroTune tray menu to reconnect SimConnect or restart AeroTune.

Dynamic Settings Enabled

→ Recommended OFF to avoid simulator-side tuning conflicting with AeroTune's optimisation logic.

Auto-Start Not Behaving As Expected

→ Start MSFS manually once and allow AeroTune to detect and cache the simulator settings it requires before relying on automatic startup behaviour.

⚠️ Due to the way Microsoft Flight Simulator manages memory, some settings (particularly OLOD, Clouds, and Shadows) may not always be available on every simulator version. AeroTune will safely continue using available controls.

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📁 Files & Folders

Configuration

%APPDATA%\AeroTuneMFS\aerotune_config.json

Logs

%APPDATA%\AeroTuneMFS\logs\

Presets

%APPDATA%\AeroTuneMFS\presets\

ML Model

%APPDATA%\AeroTuneMFS\stutter_model.pkl

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🌐 Links

Website

https://aerotunemfs.com

Documentation

https://aerotunemfs.com/#documents-section

Support Development

https://ko-fi.com/darrene

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📜 Credits & Disclaimer

AeroTuneMFS is a solo-developed project created by Darren Edwards.

Special thanks to all Alpha, Beta, Pro, Patron, and community testers whose feedback continues to shape AeroTune's development.

PresentMon telemetry technology is used for advanced frametime analysis. PresentMon is © Intel Corporation and licensed separately.

AeroTuneMFS is not affiliated with or endorsed by Microsoft Corporation or Asobo Studio.