I'll have to drop back to the previous version for now.
What do you have Reload mapped to? They've changed access to the Transfer menu to be mapped to the Reload key rather than hard-coded to R. The on-screen prompt should show the Activate key (for quick-loot) and the Reload key (for Transfer) when you hover over a container.
I have reload mapped to one of my extra mouse buttons, and it works fine for me.