Can I still register Addit Pro FSX now that the site is down, and what are alternatives?

Addit Pro FSX registration now that the site is down

You’re basically reading the situation correctly. If Addit Pro’s registration/activation depended on the developer’s website (or a license system he controlled), then once that infrastructure is gone there usually isn’t a legitimate way to convert a fresh trial into a paid/registered copy.

The one exception is if the program was designed to accept a key completely offline (no online verification) and you already have a valid purchased key. If you don’t already have that, there’s not much “above board” you can do beyond running it as a trial until it times out.

And yes—stay well clear of the “workarounds” you’ll see discussed elsewhere. Not worth the headache.

Practical ways to handle the “dirty work” in FSX without Addit Pro

Since Addit Pro was mostly about making installs/organization easier, the best replacement depends on what you’re actually adding. In the meantime, here are the reliable built-in/manual methods that cover most of what people used Addit Pro for:

1) Scenery installs: use the Scenery Library

1. Start FSX
2. Go to Settings -> Scenery Library
3. Click Add Area and point it to the scenery’s main folder (the one that contains the scenery and usually texture subfolders)
4. Check layering: airports typically need to sit above large regional sceneries/mesh entries

2) Aircraft installs: SimObjects + aircraft.cfg
If it’s an older add-on that’s just a folder drop:

1. Place the aircraft folder where the add-on’s readme expects it (commonly under the FSX SimObjects structure)
2. Open aircraft.cfg and confirm each repaint has its own [fltsim.x] section with the numbering in order (0,1,2,3…)
3. If the add-on includes gauges/effects/sounds, make sure those files are copied to the correct FSX folders per the documentation

3) Keep your own “installer library” so you can undo/rebuild cleanly
This sounds boring, but it saves you later:

• Create one folder outside FSX where you store every add-on’s original ZIP/installer + readme + any serial/email receipt
• Keep a small text file of what you installed and any special steps you took
• Back up before big scenery/aircraft waves (especially if you’re experimenting)

A couple quick questions so I can steer you toward the closest replacement workflow

1. Which FSX are you running: boxed (DVD), Steam Edition, or boxed + Acceleration?
2. What were you mainly using Addit Pro for: scenery library management, aircraft/repaints, AI traffic, or “one click installs” of mixed content?
3. Do you have any existing license key / purchase info from back when Addit Pro was sold, or is it trial-only?

Answer those and I’ll tailor the most practical way forward (and what pitfalls to avoid) for your exact setup.