Windows 10 Mail - Not able to add email accounts

Hi guys,

I have been using Windows 10 Mail app for a long time, and had two email accounts on this. One was my personal hotmail account, and one was an exchange account I use for work.
Last week the exchange account stopped working (no emails in the inbox or in saved folders). The personal account still worked but I was unable to access the account settings for either.

I tried to reset Mail, and re-add the accounts but this didn't work.

I have uninstalled and re-installed the Mail program but I cannot add either account now. I don't get any error messages it just keeps on loading and nothing happens when I try to add either account.

Can anybody assist? (Also I'm not that proficient at IT, so any explanation in layman's terms would be appreciated)
Thanks

Thanks Dencal,

Unfortunately when I open Mail I cannot get to that screen. The below is what I see:

Hi Dencal, I had actually opened this from the start menu unfortunately...

That makes sense. No, I actually don't have the re-installed app on my taskbar at all.

Do you recommend anything else?

Hi Dencal, I've already done that I'm afraid (twice actually). The print screen I sent you earlier, was from the re-installed app. May be it will never work again