Hello everyone, firstly, I am deeply sorry for the save files breaking after the last two updates, I should have sent a warning about this happening as it frequently does with all my games due to using outdated software.
I HAVE A FIX!
To fix the save file issue, you will have to revert to a previous update. To do this; right click the game in your steam library and go to properties, under the beta tab select the dropdown box and select a roll back version until your save files work again