I just did a fresh install of Crossover 14.0.0 and Quicken 2012 Home & Business (deleted old bottles, complete uninstall of Crossover 13.x, then installed 14.0.0 and Quicken from scratch), and ran into problems right away. When I started Quicken, I selected the "I've used Quicken before" option, then "Open a data file on this computer", and then browsed to the .QDF file I want to use. Quicken reports "Unable to open the selected file." I'm using Xubuntu 14.04 with all updates.
I've also tested with a VM running Xubuntu 14.04, but in that situation I upgraded to Crossover 14.0.0 from 13.1.3 without uninstalling. I don't see any problems accessing my .QDF file in that scenario.