I've uninstalled and reinstalled both, tried resetting permissions using the procedure from Adobe support. No soap. Bridge is working properly, just not LR. Specifically, I can't send any image from LR5 to ANY of my various image manipulation programs, but especially PS. Help, please!
I have solved the problem. I maintain two bootable drives on my computer, and CC had installed LR in both of them and couldn't tell them apart. Poor thing got terribly confused. I've removed the dupes and it now operates normally.