Addon Managers For Flight Simulator X, Prepar3D, and X-Plane 11

Addit! Pro For X-Plane 11

Knowledge Base

Program Installation

Questions and answers relating to program setup/installation.

I'm having trouble installing and using Addit! Pro with Windows 10/Windows 8/Windows 7/Windows Vista. Any suggestions?

Addit! Pro can’t find X-Plane 11. Help!

I'd like to reinstall Addit! Pro without losing anything. How can I do this?

The Setup program does not install anything it just opens a browser window to

The Setup program is having trouble installing some files. Is there any other way to get them installed?

Immediately after running Setup.exe I get the error "Failure Writing to the System Registry. The registry may be corrupt, or you may not have the required permissions to write to the registry."

I tried everything but I'm still having problems. Any other ideas?

General Troubleshooting

Questions and answers relating to general program usage.

I get an error when I try to select addon files to install. What should I do?
Applies to:
"Error #430: Class does not support Automation or does not support expected interface."
"Error #429: ActiveX component can't create object."

I get a type mismatch error when I start Addit! Pro. What can be done to fix this?

I get an "Error #3036: Database has reached maximum size" error message when Addit! Pro completes the startup scan.

I get the error "unrecognized database format" when I use Addit! Pro.

When I try to install an addon I get some weird run time error 430, "Class does not support Automation or does not support expected interface". Help!

The program takes a long time to load, 30 seconds or more, and performs slowly thereafter. What's causing this?

I'm getting the error "Component XXXXXXXX.OCX not correctly registered: file is missing or invalid.". What can I do?

Addon Troubleshooting

Questions and answers relating to addon installation, management and removal.

Please walk me through the installation of an addon.

I installed an aircraft but it does not appear in X-Plane 11.


Questions and answers relating to product registration.

Can I register using PayPal?

Where is my Product ID? I can't find it.

How do I register Addit! Pro?

I lost my unlocking number. How do I get a new one?


Questions and answers to issues that are not listed above.

What's the best way to backup the program?


Walkthrough Videos

Sometimes it is best to learn by example. Our videos show you how to use Addit! Pro For X-Plane 11 to install addons, step-by-step.

Watch Walkthrough Videos


Addit! Pro Help System

Did you know Addit! Pro contains a complete Help System? Just Press the Help button or F1 on any Addit! Pro screen.

Other Documentation

Two other files may have answers to your questions: Readme.htm and Register.htm. You can access both documents using your Windows Programs list.

Contact Us

If you need more help please contact us directly. We would be happy to help.

Contact Us