TileProxy .cfg changes:
In order to maximize performance the TileProxy installer offers you the option of making minor changes to your FSX.cfg and FS9.cfg files. These changes are listed below, and many are simply parameters that can be adjusted in the FSX display settings. Accepting these changes at the install is recommended for maximizing TileProxy performance. Should you experience problems with the program or decide not to fly with TileProxy activated, the uninstaller restores your .cfg files to their original state. The default locations for both your active and backed up files are:
The following information is from the TileProxy Manual and references the changes that are made:
Changes to your FSX.cfg
For a good flying experience and graphics quality "out of the box", the program's installer manipulates the following parameters in your FSX.cfg. You can easily change some of these with the FSX user interface, others have to be manually edited in the configuration file if you are not satisfied with these settings.
If you do not want these changes to be made, uncheck the corresponding checkbox in the installer that says "Modify Simulator config for performance".
Changes to your FS9.cfg
The following changes to FS9.cfg are made to provide optimal stacking of the Level of Detail rings around your aircraft. This is when you have the checkbox set to also install for FS 2004 and the "Modify Simulator config for performance" checkbox is also set