An old 4.x installation will never be overwritten by the installation of a EN-Track v6 version.
After the installation of EN-Track V6, the user is asked if the old v4 data must be used in the new version. In this case, the v4.x database is copied into the new v6 database folder.
At first startup of EN-Track V6, the v4 tables are converted to the new structure of EN-Track v6.
Note!!
Not only a software upgrade on P.C.-level is necessary, but also an upgrade on equipment-level. The EEPROM IC's of all EN-Dynamic devices have to be replaced to make it possible to communicate with the new EN-Track release.