I Need Scar Autocutter Help (in Noob Talk Plaese) Lol!

I have downloaded the latest version of SCAR for RuneScape, now I just need to learn how to use it. I don't have the computer skill level for this kind of stuff. So I don't know many computer terms. Basically I need to know how to get into SCAR, and all the way to the point where I am autocutting trees. Please be specific since I am very new to this program. Thank you so much to who ever helps. I am forever in your debt!

 

Please, someone help...