I should be more specific. If you had, for example, the default tournament (or other default files, such as the rounds template, or layout) specified in the Config Files preferences, then by changing the Data Store you'd be changing where the TD loads those files from when it starts. So you could start the TD, change the Data Store to the appropriate one for your location, exit and restart the TD. Of course, this only works with 2.6 since I added the Default files section to the Config Files preference.