A new version of Erigraph (3.18.00) and Terrameter
firmware (3.14.004) can now be found in the downloads section.

The added functionality in the new version of Erigraph is: 
- Merge 2 files together to produce RES2DINV general format
- Merge 2 files together to produce RES2DINV time-lapse
format file
- View either of the time steps or the difference between them.

Link to downloads section