My Avast Cleanup Premium said there was an issue with my disk drive and I had to restart my computer to fix the problem, when I did and launched Minecraft Dungeons my character and profile were gone, they wanted me to create a new character. I didn't uninstall MC Dungeons so how'd my character disappear? Is there any way to fix this?

There's a picture of the Disk it said had a problem. 

I've also attached my savefile from the game as proof that I'm not lying.