I compared the v4 db with v3 (Topo France v3) in SQLite browser and I have the strong impression that there is something wrong with this file. V3 shows all GR numbers and all acces-routes to a GR, v4 does contain the acces-routes but is missing all GR numbers!

Just speculating: why is the version number of this map v4.01? Probably v4 had problems, and maybe it was related to the db file... do we have the incomplete db from v4?