Thank you for the reply!
Most probably i was doing something wrong (I had many cura pages open and i got confused or something like that). I tested it today and it does save them automatically.
Is it possible that the old version of cura interfered? should i delete the older version of cura? it did ask me something when I was installing the new version and I chose to "keep my settings" or something like that.
In any case I think it is fixed or it was just my imagination.