Edison, New Jersey-based Four Seasons Software Inc will release version 5.0 of its SuperNova Enterprise application development system by year-end. It has added support for Linux and AS/400 and claims SuperNova enables developers to run application code on different target systems without modification or recompilation. Originally due back in May, the release was held back while it was fitted with a new graphical user interface. The 5.0 release includes application partitioning and remote loading. Linux developer licences go from $1,000 to $6,000. AS/400 support will provide integration with RS/6000 applications. SuperNova is up under most Unixes, Windows 3.1, NT and OpenVMS.