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The latest version of libokFrontPanel.so libary, which is required for USB3 support, is linked to libudev0. However, Ubuntu 14.04 and onward only supply libudev1. For this reason, we are supplying both old and new copies of the library. The old, USB2 version is located in Resources/DLLs/ libokFrontPanel.so. The USB3 version is located in Resources/DLLs/Linux-usb3/ libokFrontPanel[x32 or x64]/libokFrontPanel.so. To use them just copy them to the executable folder.
If you're using Ubuntu 14 and want to test USB3 support without downgrading your OS there is a workaround consisting on creating a softlink to libudev1 mimicking the libudev0 path. This can be done by the command "sudo ln -s /lib/[i386 or x86_64]-linux-gnu/libudev.so.1 /lib/[i386 or x86_64]-linux-gnu/libudev.so.0", using i386 or x86_64 depending on your architecture. Keep in mind that this is a very hackish approach and can cause unknown instabilities on your system.
Debian sid has libudev0 in multiarch repositories, so you can apt-get it as long as multiarch is enabled. Everything seems to work then.