Hi folks,
For your information I have just run QLC+ V4.7.4 on 32-bit fedora 20 in a VirtualBox virtual machine hosted on a 64-bit system.
This may be useful for anyone needing to test more than one configuration.
The only specific tweak it needed was to turn on a USB filter to make the interface visible inside the virtualisation.
Robert
Q Light Controller+
Official forums of the QLC+ project