Creates a database from the given DAT file. The database is stored in the path defined in menu File/Settings/RomCenter databases path. The name of the database is derived from the DAT file being processed. For example, if the treenode processed is Amstrad CPC\Applications\[BIN] (TOSEC-v2014-10-28_CM).dat, the name of the created database will be Amstrad CPC - Applications - [BIN] (TOSEC-v2014-10-28_CM).rdt, as is the name of the respective TOSEC DAT (also how RomCenter works).