2.5.1.15
I had two instances last night where SGP stopped working waiting for exposures to download from my Nikon D5100. Once during a plate solve and once during a focus run.
SGP had to be killed via task manager, when aborting the current activity didn't work.
Logs:
https://drive.google.com/file/d/0B-ajT8x5IBeGcVd2alpBOUFPS2c/view?usp=sharing
Subsequent to those to issues, several focus runs and platesolves did not have that issue, until I finished for the night.