how to update the unarchiver? they not recognise my apple id.
when i try to update it and enter my Apple id then system says that it apple id is not buyers apple id. when i have bought macbook at that time i ha dno apple id so i had use my friend apple id. but now in my macbook everywhere is my Apple id and even i can update OS also by my apple-id but when i try to update Unarchiver then they need old apple id. so how can i fix this problem and how can i change my own apple id instead of my friend apple -id?
MacBook Pro, OS X El Capitan (10.11.1)