OT soundconverter doesn't work after Ubuntu reinstall

[Pavel Vlček]

Hi all,

I reinstalled Ubuntu Mate 18.04 Beta 1. I am installing all applications 
now, but soundconverter doesn't want to start, but before reinstall, it 
worked normally. When I want to run it, it shows this: SoundConverter 3.0.0
SoundConverter needs GTK >= 3.0 (Error: "Namespace GConf not available")

But I don't know, why before reinstall it worked and now not. I used 
sudo apt-get install soundconverter

Thanks,

Pavel