JMRI Setup: Configuration Profiles
Configuration Profiles allow a single JMRI application to be launched with one of multiple user-specified Configurations. A Configuration Profile contains all Preferences as they are set in the JMRI Preferences dialog, and may - optionally - include user files, a Roster, and Throttles.
When
opening an older JMRI configuration in one of the newer
applications, the way Preferences are stored is converted.
The application notifies you with this dialog:
When a JMRI application (version 3.9 and up) is launched for the first time, it checks for a Configuration Profile. If no Profile exists, the application will create a default Profile and use it without prompting you. If only a single Profile is found, the application will use that Profile without prompting you. If there are multiple Profiles, the application will prompt you for the Profile to use. You may specify that the application should always start with the same Profile.
By default, when a JMRI application starts up, it prompts
the user for which Configuration Profile to use: 
If the user doesn't select a new Profile and click OK, the program will continue with the default Profile after a short delay. You can check a box in the preferences to bypass this step and go directly to the last-used Profile.
Profile Management
Configuration Profiles can be managed in the application preferences, under the Profile Configuration tab.
The line marked "Current active Profile" in the Status column is being used by this run of the JMRI application, and is also where Preferences changes will be saved.
To use or configure a different Profile, select it, click "Activate", Save and restart the application.
For more information on how to configure JMRI to share its configuration files between multiple computers, see the help page on using Dropbox with JMRI.
We recommend that Profile directory names end in .jmri so
that other applications can use that extension to recognize a profile
by extension. JMRI automatically adds .jmri to the name
of the directory for new Profiles. If .jmri is added to
the name of an existing Profile directory, JMRI should automatically
recognize and handle that change.
Sharing Profiles
Exporting
Profiles can be exported from the application preferences Config Profile section. An exported Profile is a compressed archive containing the Profile's contents, and will optionally contain the user files and roster if they are stored outside the Profile.
Importing
JMRI does not yet directly support importing Profiles.
A Profile can be imported by uncompressing it using an archive management utility into a new directory and then opening while launching JMRI or from the application's Preferences by clicking the "Add Existing..." button.
Note that using the Profile Import/Export capability to copy JMRI data back and forth between two computers is neither supported or recommended.
Upgrading from Earlier Versions of JMRI
When you first run a JMRI application after upgrading from an earlier version of JMRI, the application will copy its existing configuration to a new Profile, and use that Profile. If you are using a JMRI application you had not used prior to upgrading, the application will behave as described above.
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