Updating Avada Theme, WordPress Site is Blank and Cannot even get into Dashboard

I updated to the new verison of my AVADA theme. When the update happened, all of my pages looked different so I decided to switch back to the old version until I was ready to make the change. Once I clicked the old version of AVADA, the wordpress site went blank and now I cannot even get into Dashboard. I had bluehost, my hosting site, restore to a backup from yesterday when the site was all in order. They said the backup is complete but my site is still blank. Please help.