# BESS-4 Tool Notes

BESS-4 was retired on 13 October 2024 and is no longer supported.

BESS-4 projects are able to be opened and viewed as read-only projects.

You may make a copy of a BESS-4 project ('Save As' to a new project). Note this will upgrade the project to the latest version of BESS.

The BESS-3 engine was released in August 2019, and was superseded by BESS-5 in May 2020.