How to apply a patch in android studio?

I have only a few months android experiece .Recently I updated to android studio 1.2 and the update broke the preview pane , i would like to help with this bug by checking what works and what doesnt ,

It says here in the Known issues page

Workaround 3: If the above workarounds don't work for you, and you are on windows, please try downloading a build from https://drive.google.com/file/d/0B6b7eYGgoFdCTWFyYWlySExjUlE/view which probably solves the issue. Please report back on the issue tracker whether it worked for you or not.

and here is the issue tracker https://code.google.com/p/android/issues/detail?id=170841

I have downloaded the .zip file but have no idea what it means to apply the patch , and i'm currently working on some simple apps and would hate to break the IDE ,

PS: As soon as the bug is fixed i will also switch to the stable update channel

At Android Studio : Top menu Select VCS -> Apply Patch