Recovering mail from files within the eM Client folder

I had eM Client 6 running at a friends computer, but suddenly (I dont know if they did something wrong), eM Client kept crashing and restarting.
After I renaming the eM Client folder in C:\Users%Username%\AppData\Roaming,
I could start eM Client again.
I had to re-confgure the his IMAP e-mail again to.

My real question is, because emClient kept restarting, I could not backup de mails my friend put in the local eMClient folders.
So, is it possible to recover the mailes from the old emClient folder?

Hi, if he is using IMAP then he should have his emails still on the server, easiest solution is to create same account on new database and let it re-synchronize.