Can't get Todoist synced with Gmail
I purchased Todoist after trying the free version as I find it very intuitive and easy to use. I would like to sync my Gmail to it, but cannot get the app to download. I'm using a Mac and yes, I have Firefox adblock, but can't figure out what to do next to get it to work.
PS. I have very few tech skills, so if you can please help in the simplest way possible (meaning don't assume I know any shortcuts) I would be very grateful.