HelpLegit helpers questions

So i bught their package today, i am using their macro effect but i have some questions that were not answered at their page

Question 1 What does the Press and Up options mean? like what is the difference and what should i use?

Question 2 When i load a macro i get a message saying The macro may not work correctly bursts mode, perform recommended action? Yes or No?

Question 3 after i press yes or no there is a message in the cornor saying PUBG.by.LegitHelpers (1280x720) Should i use 1280 x 720? or can i use 1920 x 1080?

Question 4 What is the difference between One-click_Singlefire And One-click_Singlefire[LMB] ?
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*Update * all questions answered on another post i made, thanks

what about 4?

Hey man! if i buy the package, can i send it to a friend and he can use it too?