After installing without any problems, I let the program tweak automatically my connection. It was fast, and I had to reboot my system…
Then I tried to browse and… impossible to open a page, no more internet ! So I went back to the program to see if I could roll back the changes, but it does not give any possibility of rolling back !!
After several attempts to fix everything, I had to restore my system (I was wright to create a restore point before installing this software!).
Uninstalled!