Please help

Hi,
I am using newest version of unreal engine, and when I go to tools edit spilines, I click by right click and it does not do anything. My second problem is that tutorials are outdated and not clear. I also tried unity engine, and Unreal engine is so much better, but tutorials here are really bad. I tried to follow landscape tutorial, and at one point it told me to press plus sign icon on some place. Problem was that that icon was not there. Please update it I do not know how to continue with tutorial. Also is there any way to change how foliage Is behaving? when I go farther away from it it becomes ugly crosses, and 120 plants can lower my fps to 10, while I have high-end laptop.
Also support pages are not working