Doesn’t work with APC UPS battery monitoring

I downloaded Battery Diag after upgrading to Yosemite but it crashed repeatedly instead of opening. Eventually I tried unplugging the USB cable that monitors my APC UPSs battery status & could then open Battery Diag, but when I plugged the UPS monitoring cable back in Battery Diag immediately crashed.

So all that Battery Diag gives me is a prettier view of my Macs battery status (which I can already see in the Menu Bar), but at the loss of any info about the status of the UPS battery.

macuser 1948 about Battery Monitor: Health, Info, v1.2