You can migrate your custom settings and files from previous releases of AutoCAD to your new release. It is recommended that you migrate from a previous release right away. This prevents you from overwriting files or having to keep track of any custom settings you may make in the new release. Migrating settings overwrites any new settings.

You can use the following tools to migrate settings and files:

• Migrate Custom Settings dialog box. Migrates user profiles, CUI and CUIx files, tool palette files, AutoCAD and user-defined linetype files, AutoCAD and user-defined hatch patterns, and the acad.pgp file (a file that stores command definitions and aliases). The Migrate Custom Settings dialog box is displayed when you start the product for the first time. You can also migrate settings later from the Start menu (Windows).
  NoteThe release of the product from which you are migrating determines which custom settings and files can be migrated to the new release.
• Customize User Interface dialog box. Converts legacy menu (MNU and MNS) and CUI files to the CUIx format while leaving the original file unchanged. Migrating user interface elements, transferring data between customized files, and customizing user interface elements are simplified in this dialog box. For more information about the CUIx file format and how to migrate menu and CUI files, see User Interface Customization in the Customization Guide.
• Migration tools. Aid migration of settings or files that cannot be automatically migrated (such as AutoLISP^® files and the accompanying MNL files) or that require you to make a decision about which files to migrate (such as which files in a set of drawing files). Download these migration tools by visiting www.autodesk.com and then performing a search on Migration Tools.