Open a Excel workbook.
In the left of the top menu, go to File.

On the left, click on Options.

You get this new window:

On the left, select Add-ins.
Then at the back select COM add-ins.
Then click on the Go... button.

You get this new window:

Thick the prologinexcel check-box.
Click the Remove button.

Close excel.

Go to the Windows Apps manager.
Find prologinexcel:

Click on Uninstall.