Improve UX

[xiwenc]

Feedback from user:

I did it by hand since I was unable to understand the part when it said it will delete user libs what will happen actually and how many jars will be deleted would it be all it thought are not used. So i thought deleting them by hand would be more controlled.

Also, I did not understand that when i use this command does it collect all the non-working/not used user libs or there is some other criteria