config.ini

The configuration file config.ini in the folder configuration at the location where the application is installed, contains information where the data of the application is stored.

This file contains information for the Eclipse platform and you should not make any modifications when you don't know what is the purpose of the setting.

Doing wrong modifications can cause the application to not run any more.

Modified settings will be applied when the application is restarted.
More info about the file config.ini can be found here.

Data directory

The data directory is defined in this setting:

osgi.instance.area.default=@user.home/mytourbook