Tracking multiple radio frequencies

I am attempting to estimate multiple transmitter locations using my Kraken with the local save option (CVS file). What is the maximum number of transmitter frequencies that can be tracked simultaneously (20 would be ideal)? Additionally, to start data collection, I have to double-click the frequency on the spectrum page of the web interface, is there an easier way to do this? And how would I start data collection when tracking multiple frequencies? Thank you!