have a new computer & a license.

have a new computer & a license.  Can’t get emails that are in old computer into new as I don’t have access to old computer. can’t em just create what was there in the new.  Tried downloading & adding lic #, but got nowhere.  Actually, it crashed per the message from microsoft!!  Need them! 

If you login to your email account using the web interface for your email provider, can you see these missing messages?

If not, then it is most likely that they were saved in Local Folders on the old computer, so not synced with your server. Is it possible you have a backup of eM Client, or can get access to the old computer again?