Hey everyone,

-> Support for bugs and suggestions: https://api.preflightly.app/support/

Some of you might know me from a few years back. I went quiet in 2023, became a dad, life happened. I've been chipping away at something new in the gaps and I'm finally ready to share it.

Preflightly is a free, modern add-on manager and Route Finder for Microsoft Flight Simulator 2024. Symlink-based activation, smart grouping, a full GSX Profiles page, and an Autorun for your companion apps.

If your Community folder has slowly gotten out of hand (hundreds of folders, liveries you've lost track of, sceneries that drag every startup), this is meant for you.

⚠️ Coming from MSFSAddonsLinker or another add-on manager?

Preflightly is meant as a replacement. You can point it at your existing AL library on disk, no need to move anything back to Community/ first. Preflightly scans your library (or libraries, you can declare several), and creates the symlinks in Community/ itself. Once you're set up, the previous tool can be safely uninstalled.

🗂 Source folders + symlink activation

Your add-ons stay exactly where you put them. You point Preflightly at one or more source folders (one big library, or your AL library + Orbx + Aerosoft One + your own region-by-region setup, whatever fits), and Preflightly only creates the symlinks between those folders and MSFS's Community.

Toggle an add-on on, a link appears in Community/ and the sim sees it. Toggle it off, the link disappears. Nothing is ever copied, moved, or duplicated. The library stays clean, MSFS only loads what you've actually enabled, and startup times drop accordingly.

Need to flip a whole page at once? A Toggle All button activates (or deactivates) everything currently visible, respecting your search and filters, several hundred add-ons in seconds.

🤝 Plays nicely with third-party installers

Orbx Central, Aerosoft One, Contrail, FlyByWire Installer, iniBuilds Hub, simMarket: Preflightly auto-detects them, lists them in Settings, and leaves their symlinks alone. They keep managing their content, Preflightly indexes everything in one place so Route Finder sees the full picture.

🛎 GSX Profiles page

Preflightly indexes every GSX Pro profile in your GSX folder and gives them their own page. Each profile is matched to the scenery it belongs to, so you can see at a glance which airports are covered, which profiles are orphans, and which sceneries still need one.

Click any profile for a zoomable map of the airport's stands (jetway gates, walking-pax, bus, cargo, deicing zones, VDGS halos), an operators card showing the ground handlers in use, and an Expert mode for the raw numbers.

Clean GSX finds duplicates and orphans and shows you exactly what it wants to remove before you confirm. When a scenery ships its own GSX profile, a one-click banner copies it where GSX Pro will actually load it. And on the Sceneries page, a Search ↗ link jumps straight to a flightsim.to search pre-filled with the airport's ICAO when you're missing one.

📥 Quick Import

Drop a folder, a ZIP, or a GSX profile onto the dashboard. Preflightly finds the manifest root inside nested archives, figures out what the package is, drops any embedded GSX profile in the right place, and asks before replacing an existing version.

Drop a ZIP that bundles several add-ons (a freeware airport plus its companion pack, a livery pack…) and it imports every one of them, with a per-add-on Replace / Skip choice. The usual five-step routine (unzip, dig for the folder, move it, deal with GSX, check the version) becomes one drag and drop.

✈️ Route Finder

Route Finder cross-references 70,000+ commercial routes against everything in your library. Not just managed add-ons, but also your Official and Marketplace/Asobo airports and aircraft. If MSFS ships an enhanced default airport and you've got it enabled, it counts as coverage. You don't need third-party scenery for every stop. And the bundled stock liveries that ship with the Asobo aircraft (KLM and United on the 787-10, etc.) count as available too.

Aircraft matching goes a bit further than a strict ICAO lookup. If a route calls for an A321 and you don't own one but you have a Fenix A320, it'll suggest the Fenix as a sensible substitute. Same family, close enough to fly the route with the right feel. When the matcher has multiple options it shows them all in a picker so you can pick the one you actually want to fly. It always prioritizes what you own (community and payware first), then falls back to variants and family matches.

Times are shown in Zulu by default (matching METARs, flight plans and SimBrief), with a Settings toggle for airport local time. Every route gets a live countdown to departure ("in 2h 15m", "12 min late") and a day / night / dawn / dusk tag computed from the real sun position along the flight. Airports show ICAO codes everywhere (EGLL, not LHR).

The idea is to stop bumping into "I don't have the right plane for this" and instead see what your library is ready to fly today.

🗺 Dashboard map

A live world map of your install: managed airports in yellow (or green if you don't have GSX), Marketplace/Asobo airports in blue. A halo around any dot means you have a GSX profile for that ICAO. Click any airport for details (scenery name, publisher, version, status) and a snapshot of coverage stats by country.

🧠 Smart grouping + conflict detection

After the first scan, Preflightly suggests starter groups: sceneries by ICAO region, aircraft by category. Handy when you want to activate a whole region before a session and switch it off after. It also reads each package's manifest to detect the type (aircraft, livery, scenery, GSX profile, dependency library) so asset packs don't end up polluting your scenery list. And if you try to activate a third-party airport that fights with an Official or another community scenery for the same ICAO, you get a warning before the symlink is created so you can pick which one wins.

🚀 Autorun for companion apps

Preflightly detects your installed sim tools (SimBrief, Navigraph, Little Navmap, vPilot, GSX, BeyondATC, ActiveSky, etc.) and launches them in sequence before your flight. No more opening apps one by one.

🗃 Your files, untouched

Preflightly doesn't move, copy or rewrite your add-ons. The symlinks it puts in Community/ are the only thing it adds to your install, and Reset removes them in one click. If you walk away, just uninstall, there's nothing to restore.

This is a passion project. The sim community gave me a lot over the years and this is my way of giving something back.

There's a feedback link in the app if you hit anything weird, every report is read and helps me prioritize fixes. Be gentle, I'm also running on limited sleep. 😅