If you get an error on Google Chrome when installing TubeBuddy, you need to temporarily disable BitDefender while you download and install and then white list the folder that it gets installed to (Sorry for the extra steps!) Reasons why here: https://tubebuddy.freshdesk.com/solution/articles/5000627044 

(1) How to Temporarily Disable Bitdefender

2) Go install TubeBuddy: https://chrome.google.com/webstore/detail/tubebuddy/mhkhmbddkmdggbhaaaodilponhnccicb

3) Add TubeBuddy Folder to Whitelist

C:\Users\<YOUR NAME>\AppData\Local\Google\Chrome\User Data\Default\Extensions\mhkhmbddkmdggbhaaaodilponhnccicb