I think Broomstick bass and Bornemark are well and truly gone, you wont get any official support I don't think, it's still for sale (maybe it shouldn't be), but I think you take it as is, it either works or it doesn't, you'd be pretty safe if you're still running XP but any thing else would be a bit of a gamble...
Shame too, it was really good, I used it all the time before I graduated to Vir2 Basis, I never used it as a "virtual bassist" I just disabled that and used it's kick ass samples via midi.
That's a shame, it's a good bass VST. I never used the auto mode either, just the manual mode via MIDI. I didn't have this problem with it until yesterday. It just started happening out of nowhere. I didn't do anything except updated the drivers of my sound card. I tried to run it through jBridge but that doesn't fix it.
It seems on a side note that Native Instrument's B2 VST is doing the same thing at times.