Thank you. So I've gone to that line, changed it to just read "algoStr = DIJKSTRA_BI", deleted the jar files and the osm.gh folder. I then regenerated them and restarted the server with ./graphhopper.sh web greater-london-latest.osm.pbf
However, in the Terminal window, astarbi still displays as the algorithm used if I haven't specified an algorithm in the URL. Is there some other step I've missed?