Best way to update updated apps library according to latest Ionic release

I created an App using ionic few months ago and there are so many changes regarding CSS and ionicons in the latest ionic library. I need to ask what is the best possible solution to update my app library to the latest ionic library i.e. how I can use latest icons, styles etc in my app which was created with an older version of Ionic.

If you created the project with the ionic cli, you can use ionic lib update.
If not, you can use bower, or download the zip on the site.

hi,mhartington!Which path could i enter? Project Path or Root Path?

You would this with the project path