With the USB Issue, I lost the functionality of the USB2.0 port right next to the 3.0 one after installing the newest Fresco USB3.0 Driver. I literally had to do a system restore because uninstalling the new driver and installing an older version didn't work, it was very frustrating. And I think I had the USB charge enabled in the BIOS too.
And for the FN keys, yeah your best bet would be to uninstall the driver, and re-install the 1.0.014 version. But again, I did a clean install instead of an upgrade, so that could be your best option if the Fn keys still aren't working after that, because my keyboard and volume fn keys are working just fine
Sager NP9370
256GB Samsung 840 Pro SSD + 750GB 7200RPM Secondary HDD
nVidia GeForce GTX 680M 4GB VRAM
Intel Core i7-3630QM 2.40GHz
16GB RAM
Mouse: MadCatz R.A.T. 7
Keyboard: Razer Lycosa Mirror
Additional Monitors: 24" 1080p Insignia LED/LCD TV and 21" Acer LCD Monitor
Windows 7 Ultimate