Hello Guys ! 

I find an old file .key from multibit that i used a long time ago. The file is encrypted and i try to put in multibit software but doesn't work !

I don't remember if i use a password but when i used multibit i just open the software and used it..
I think when i use the software for payment, there is a creation of file.key ?? and it is automatically encrypted ? i'm not sure of the functioning

Somebody have an idea to decrypt .key file ? and a procedure to do it ? 

Thanks brothers !