HELP! notebooks gone after update

I updated Joplin, and now all my data is gone!
is there some trick to getting it back, or is it gone forever???
I saw no warning about this with the update…

More info is needed.

well, what more information? i need more info on what more info you need.
I believe it was via the help/check for updates feature. Was informed there was a new update. So i updated Joplin, and then when it reloaded, ALL MY NOTEBOOKS AND NOTES WERE GONE.

Hi, for example what operating system, what version of joplin, what are you syncing with, etc.