Discord deleted itself (Windows 10/PC)

Hi. I using discord since early 2016 it's happens for the first time. I literally out from room for 3mins and then return and discord was closed and app no longer exist.. also living alone so there no one who can do that. Also using 2FA and other safety measures so it was just weird.  From google I can see same was happened for others in previous years so I just want to know what is it was???