Hi, I was working with Unreal Engine 4.14.3, last week I crashed twice, I sent the message to epic games, now after a couple of days did not open Unreal I found no projects! I lost ALL MY projects … why? Thank goodness I was only at the beginning of my Open World… >:( Anyone know why?
I don’t think you “lost” the projects, They probably just disapeard from the list.
Try going to the projects location on disk, And it should be there.
Also: Have version/backup control inplace (Subversion, Perforce, Git, Etc)
HTH
Thank you, sorry for my english… Now i’m trying to found it…
Your welcome 
Your english is fine
IIRC it is stored in your documents folder on Windows.
Searching for files with a “uproject” extension(“.uproject”) should find it.
HTH
This was an early reminder to you that you should use source control, like git 
Ok, now I’m lookin for that files