A new version of
qsf
finally showed up in the FreeBSD ports tree so I installed it,
upgrading from 1.0.18 to 1.1.0.
With this version it is recommended that you retrain from scratch,
so I did that - it took 60 hours, because I have a lot of training
material!
After that was done, it has been working great, much faster
than the previous version.
I'm using the re-vamped built-in database backend.