I used anki web as well as anki on my computer. I always got the message that it I either have to upload or download. So I clicked on one of the buttons and all my cards disappeared. I know that usually the file is in the backup folder, however, the last file is from yesterday and the first one is the new (synchronized) version.
There is no back up file of my work today.
I worked the whole day on it and created so many cards. Is there any was to reset the program to the old version or restore the file although is is not existing in the backup folder?