FreeFileSync Forum

I want to use FreeFileSync to keep Thunderbird synced on two computers but I can't see any of the . prefix folders in my home directory.

I am only a few months into Linux so please excuse my naiveté.

I extracted the files for 8.1 to /usr/share/FreeFileSync/.
I executed all this commands:
sudo apt-get install build-essential
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-4.9 g++-4.9 ...

I made a new folder in my Home directory and extracted Ver. 8.0 into it. I went into the folder and located the FreeFileSync executable file. When I try to run the file nothing happens.