I was playing in the explore outbreaks, then went to the main simulation and all my progress is lost. As such I cannot get back to the plague exploration. I've reviewed the FAQ on what to do if my progress is lost which says the following
"Click on the help section settings menu and scroll down to Save Restore. Click on that and you will see 5 recent saves with dates and total playtimes. Choose the most recent one with the greatest playtime. That should restore your game to the latest point possible."
But there is no option for save restore.