E4D v1.0.0 contained run modes for electrical resistivity tomography (ERT) mesh building, forward modeling and static inversion.
E4D v2.0.0 contains run modes for ERT time-lapse inversion and spectral induced polarization (SIP) mesh building, forward modeling, static inversion. Travel-time tomography run-modes (mesh building, forward and inverse modeling) are also within this release.