Same thing happens to me on my galaxy s4, running google edition custom rom 4.4.4
I open AirDroid, put in my email and password, it starts to login, then says "Unforunately, AirDroid has stopped" even though at the bottom I get a small bubble message saying "successfully connected". I've tried uninstalling and reinstalling and restarting my phone, clearing the airdroid data, nothing works.