Sorry to hear. Are you playing 0.1.13? And it happens for both the premade and user made characters? If you go to the game folder, then drill down to the "Data/Save" directory, are there files in there?
One possibility is that you either don't have .NET installed (not likely since the game wouldn't run), or you need to be on a more current version. Locally I have .NET 4.7.2 installed. You can get the runtime from Microsoft: https://dotnet.microsoft.com/download/dotnet-framework/net472 Just one idea!