Autogen objects are defined by default.xml under FSX’s Autogen folder.   Many third-party sceneries during installation will add new objects to the file, making it bigger and bigger.

Here’s a quick and easy way to reduce the size of it and bring some improvements, especially to low- to mid-end computers.

1) Locate default.xml in the Autogen folder of the Microsoft Flight Simulator X directory (x:\Microsoft Flight Simulator X\Autogen)

2) Backup the file first for safety sake

3) Open the file with Notepad

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