  We present an update to the in-flight radiometric calibration of the Hinode
EUV Imaging Spectrometer (EIS), revising and extending our previous studies. We
analyze full-spectral EIS observations of quiet Sun and active regions from
2007 until 2022. Using CHIANTI version 10, we adjust the EIS relative effective
areas for a selection of dates with emission measure analyses of off-limb quiet
Sun. We find generally good agreement (within typically $\pm$ 15%) between
measured and expected line intensities. We then consider selected intensity
ratios for all the dates and apply an automatic fitting method to adjust the
relative effective areas. To constrain the absolute values from 2010 we force
agreement between EIS and Solar Dynamics Observatory (SDO) Atmospheric Imaging
Assembly (AIA) 193 Angstroms observations. The resulting calibration, with an
uncertainty of about $\pm$ 20%, is then validated in various ways, including
flare line ratios from Fe XXIV and Fe XVII, emission measure analyses of cool
active region loops, and several density-dependent line ratios.
