Where are my settings stored?

Most of Rhino's settings are not stored in external files, but in the registry. Because there is not one single file that contains all options and personalizations, you will have to do a bit of work to transfer all of your custom settings. There do exist some shortcuts:

The easiest way to transfer the bulk of your settings is to use the Rhino command ExportOptions, which creates a single file with MOST of the user customizations. Importing this file into another installation via the command ImportOptions will transfer most common settings.

Display modes are not included in the ExportOptions, you need to export them separately! You do this from Options > Appearance > Advanced Settings.

The workspace file (.tb) contains all the toolbar customizations, one can copy this between installations as well.

Other things that might have been modified could be your template files, display modes, installed plug-ins, etc.

Umm, that sounds complicated, how do I transfer all that?

A general transfer procedure might look like this:

In the old install:

ExportOptions - creates an .ini file

Make a copy of your workspace (.tb) file if you customized it

Make copies of any custom template files you created

Export any custom display modes (if you created any) - creates one .ini file per display mode

Make copies of any other external files used, including:

Non-standard plug-ins

E-maps

Scripts

etc.

In the new install:

ImportOptions and import the .ini file created by ExportOptions

Copy your workspace, template, emaps, scripts, plug-ins files to appropriate locations

Tools>Toolbar Layout and load your custom workspace

Go to Options > Appearance > Advanced Settings and import any custom display modes created, one by one

Drag n' drop your extra plug-ins into the Rhino window to install (some need an external installer, use that if necessary)

Set Rhino up to open with your custom template.

In the Files section of Options, set file paths to scripts, templates, etc. if they are non-standard.