Storing tab setup failed

I get this error often.

"The it says: Tabs won'r be stored in this session"

and

"Unable to write to ..." "The process cannot access the file because it is being used by another process"

And then sometimes the tabs from another DB appear in another DB on initial connection

Do you probably open multiple HeidiSQL instances, which all access the same files?

Not sure what you mean by "access the same files"

But if you mean saving sql statements to disk and then retrieving them; no

Each DB has a separate folder for the files

I often get exactly the same error. I often open two HeidiSQL instances and within each instance I often open multiple query tabs and leave them without closing as long as I can. I don't shutdown my PC I only hibernate. This error often occur moments after i wake my PC up.