Cannot access Reckon Accounts

I am running Reckon Accounts Premiere 2019 with a three year license due to expire in the fourth quarter of this year. I am running a Windows 11 computer and the application has been working fine until now. I last used the application about a week ago however today when I click the Reckon Accounts icon it comes up with the warning (attached) and I cannot access the application. Every time I click on the icon I get the same warning and cannot access the application.

A concerning thing about the warning is that Microsoft Internet Explorer was superseded years ago and it is my understanding this product is no longer available or supported by Microsoft.

Why is Reckon Accounts now requiring a deprecated product be installed? Obviously I want a solution to this problem fixed so I can on with my work.