Installing does not work as described in the Instructions, but anyway I managed to get it done.
But after testing the app, it did not fullfil my expectations. I was hoping that it could sync from a folder in my mobile phone (connected via cable to my PC) to a folder in my PC and viceversa, but even though I can see it when I examine the directories for selecting folders, they don’t get selected. So it was disappointing and I don’t think I am going to use it. There are freeware that has this feature, so I will keep using this.