It has recently come to my attention that the previous update was wiping peoples save files, and this is an issue with how I was storing saved data. This is completely my fault due to an inexperience of working with Steam, and I apologize to any players affected. Sadly, to fix this issue, I have had to rework how data is saved, so updating to the most recent version will put you back at the beginning of the game. Fortunately, you will keep your skins since they are saved separately from in game progress.
Again, I sincerely apologize to any players affected, but this fix is necessary to ensure that no more save data corruptions will happen in the future.