UNSOLVED font awesome

[bdream]

Hi.
I played a bit with font awesome getting nicer pics into my calendar.

Now I have questions I can’t find answeres to…

1. Is there a need to have different versions installed? (3, 4 and 5 maybe)?

2. Is installation like copy to a new folder under vendor/node_modules and add aine into vendor. js as

"font-awesome.css":"node_modules/font-awesome_5/css/all.css",

Or do I need to delete old entry?

3. Is there option to restore back to latest official MM-provided font-awesome?

Many thanks