Yeah, time measurements would be a great addition and not that difficult to add. I’ll have to do that sometime. I have plenty of plans how to enhance this, but thought I would release something in the meantime 
You can use e.g. http://tortoisesvn.net/downloads.html to download the code on Windows.
Re: the frequency response app, the measure_rms function waits on the DMA to get the phase correct. See rms_measurement.c line 35-37. If you don’t care for the phase measurement, you can comment that out. Otherwise you’ll have to wait on the timer instead.