STEM
    7.1 includes an integrated sensitivity analysis tool which heads a strong cast of
    new features designed to boost your business modelling output, plus improved portability
    for distributed model packages.
    This release is fully upwards compatible with models created in version 7.0, but
    models saved with STEM 7.1 cannot be read by STEM 7.0 or earlier versions. STEM
    7.1 is now superseded by the 
        STEM 7.1d maintenance release.
    You will require a new soft licence or activation code for your dongle(s) if you
    are upgrading from STEM 7.0. Please contact us when you have installed this new
    system and we will then send you the necessary authorisation data.