You can reset the integrated development environment (IDE) to a previous state using the Import and Export Settings wizard. All settings and categories are, by default, applied; if you want to specify which settings to change, use the option Import selected environment settings.
To Reset Your Settings
—or—
If you want to delete your current settings combination, choose No, reset settings, overwrite the current settings, and click Next. This option does not delete the default settings, which will still be available the next time you use the wizard.
The Reset Complete page alerts you to any problems encountered during the reset.