This readme describes some issues about running Linux version of Wattconfig ECO software.

1. 
To run the app you need GTK2 libraries. 
If your distribution does not have them installed then install them in a following way:

sudo apt-get install gtk2.0

2. 
To connect via USB you need installed FTDI drivers and sufficient permissions. 
Usually the FTDI drivers are already part of Linux kernels so there is no need to install them.
If you connect your controller via USB cable then the connection device usually identifies itself as ttyUSB0.
And usually ttyUSB0 belongs to the dialout group. You can check this with:

ls -l /dev/ttyUSB0

Add yourself to this group by typing: 

sudo usermod -a -G dialout $USER

Then you should be able to connect to your controller via USB.