Good evening Annette and welcome back!
Thank you for reaching out to us. We are sorry to hear about the site crash. Yikes, that’s aweful!
We will gladly try to assist you on this topic.
I believe you should know that normally, our plugins do not update on their own.
The built-in behaviour is that you get notified every time an update is available,
But you and you alone should get to decide if and when you want to apply the updates.
This leads me to believe that there is probably something in your WordPress wp-config.php file our in the functions.php file of your plugin that triggers the auto-update.
To prevent this from happening again, I suggest reading the following page from the WordPress codex.
This should enable you to control what gets updated and when.
Let me know if that helps.
Have a great day!
Geoff B.