Thanks for the advice. I've basically ignored it for the last couple of years, but with the Yosemite changes the bugs are reaching a breaking point. One of my concerns is that the bad reviews are starting to have a "negative halo" effect on my other app, so I'd like to take some kind of action on it.

In some sense I've been here before. My very first app was an iPhone app, actually one of the first police scanner apps, with a glowing map of Chicago that got me into the whole software-mapping thing. I had to put that one out to pasture a few years ago, even though I thought there could have been a viable little business in the right hands.