Andrew - how many turns have you got loaded? I can only say that after about 2-3 months of turns I dump the DB and start again... not all that good but until the day Floyd and I implement a better way(and neither of us has the time at present) - this is what you'll have to put up with.
Last count I think was 87 turns. Sounds like that is whats slowing it down. Wonder if I go into data base management and dump a bunch of alerts if that will speed it up without having to dump the turns. I just love having the device and formation history available.
Regards
Andrew