Is there a way to offically get this in writting? Like from the writter of the software?
I'm sorry to disappoint you, but this is not possible. Suppose you were doing something on your computer one stormy night, when suddenly it got hit by a lightning which burnt your hard-disk. Would you then call Microsoft and ask them to deliver you a new disk with your lost files? Of course not, because they wouldn't know what you had there. It's your personal computer, and if you do not back up your data before the disaster chances are they are lost forever.
The same idea applies here. mIRC is just a client program. Khaled (its author) doesn't run the IRC networks and so he can't tell what is going on there or who's chatting with whom. I'm sorry, but we can't help. From now on, be sure to have logging enabled at all times so this unlucky case doesn't repeat itself. (To enable logging go to Alt+O >>
Logging and select 'Both' in the drop-down list.)