I have the same problem, I have been using Quick Books 2012 on my laptop, pc stopped working.  All of my data files are stored in Dropbox.  I've located a recent QB - QBW file and have loaded it into a folder on my new pc.  Signed up for QB On-line but can't migrate.  I downloaded the QB2015 file and tried to install but the license / product number on this thread for QB2015 does not work.  Douglas