I have Frequency Manager and Scanner running on versions 1114, 1193, 1231,1260, and 1270 of SDR Sharp and i have not had much luck getting it to stop on any frequency in any of the versions.
One other thing I have found is that it each version that I use the Frequecy Manager Scanner on, the frequency will be about 20K off center frequency of where it is supposed to be. I have tried to center it with no success.
MB