Hotmail account no longer working with eM Client

About a week ago, my hotmail account stopped working with eM Client.  It kept asking me for my password but wouldn’t get any further ( I can’t remember the error message now).  Anyway, it kept trying every 10mins and sending me error messages, so I deleted my hotmail account from eM Client.  I tried to add it again, but I kept getting the same message.  Today I have tried to add the hotmail account again but am now getting a different error message:
Unauthorised client: The client does not exist.  If you are the application developer, configure a new application through the application management site at …

Any ideas what I can do people??  Don’t want to have to find a new mail client.

If the hotmail account is set to IMAP and the version you are running is older than v7.2.34959 then take a look at this Reaction to the Outlook.com authentication problem note.

Liviu is right.

Just download the new version from the Home page of eM Client
https://emclient.com/
Afterwards you most likely need to supply your password for hotmail.