Bug 1:
If there is a blank in the Robbobases path, as in
TripleBase_Path C:\Documents and Settings\...,
the path gets truncated into
TripleBase Path: C:\Documents
which of course does not work!

So I moved the Robbobases to a path without blank,like
TripleBase_Path C:\RobboBases\RobboTotalBase
TripleBase_Path C:\RobboBases\RobboTripleBase
... and the auto-load worked well when launching FireBird_12_w32.exe (or FireBird_12_x64.exe) in console mode
...but Bug 2:
auto-load did not work in the Fritz 11 GUI or in the ShredderClassic GUI: engine did not load.
Actually, the problem seems to be with the Z directory of the RobboTripleBase: if I rename Z into aZ, the contents of aZ are of course ignored during auto-load, but the rest is OK.
Maybe it's a timing problem (engine takes too long to load...)?