Cannot install updated driver on Lenovo X1 Carbon and USB 3.0 Dock

[ErikJD]

I am running a Lenovo X1 Carbon (Type 3444-2HU) with a Lenovo USB 3.0 Dock.

No matter which DisplayLink driver I try to install from the DisplayLink site (including the latest Windows 8.1 Release Preview (build 9431)), the DisplayLink driver version is not being updated under ThinkPad USB 3.0 Dock Properties in Device Manager. Here is what this tab says:
Driver Date: 3/19/2013
Driver Version: 7.2.46733.0

This is relevant info from the Details tab:
Device description: DisplayLink Adapter (4302)
Hardware Ids: USB\VID_17E9&PID_4302&REV_0014&MI_00
USB\VID_17E9&PID_4302&MI_00

My entire system was working fine until I upgraded my system to Windows 8.1 Preview (which I have since uninstalled in favor of Windows 8). In Windows 8.1, and now in Windows 8.0, Microsoft Lync 2013 crashes upon startup.

I've tried reinstalling the Lenovo drivers (install file Setup_U3_Dock_Lenovo_EXE_v10708), but nothing has worked...

I'm out of ideas. Looking forward to your feedback. Can I even install DisplayLink-provided drivers on my Lenovo USB 3.0 Dock??