This is super weird.
I am absolutly stunned by the fact that a file can be vanished by ending a program.
Let me talk to our programmer and do some research. Right now i have no clue how this could happen.
Comming back with new informations soon...
(Alternativly join our discord, some of our catlovers already found solutions to weird problems like yours, maybe someone there is faster than us or has an idea. - http://discord.wildwoodsgame.com/ )