The historical database is provided in the 7-field "MetaStock" format, where the fields are Date, Open, High, Low, Close, Volume, Open Interest. The latter two fields are not applicable to Forex.
At installation time, the data may also be installed in CSV format (comma separated values).
The "free trial" history has data extending back 6 months. However, it also includes full histories for AUDCAD and CHFJPY. The extent of the data for each item in the "full" history can be seen in the "Primary Exchange Rates" table under Coverage.
The extended, or "full" history, may be purchased as a "stand-alone" item (without a subscription to on-going updates). If a subscription to updates is taken out at a later time, it should be taken out under the original account used to purchase the history, in which case a fresh, up-to-date version of the history can be downloaded and installed.