App quits when saving files

Testing version:
v1.0(1208)

What were you doing:
I was typing my notes.

What feature did you use:
I tried saving my note.

What happened:
So i tried saving my note and got this pop up that said I had to duplicate file to save (weird?), so I pressed duplicate and the app not only quit but did NOT save my notes so i lost everything. I tried duplicating files but the app just get quitting.

What did you expect to happen:
I expected my file to have been duplicated and saved.

Hello and Welcome,

I’m trying to figure what happened and how to simulate the crash. It’s quite odd the message popped out of the blue, any chance you had another file with the same name but with a different extension in the same folder? If I have understood correctly you get an app crash each time you duplicate a document?

Thanks for reporting this issue.