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.