Occasionally someone will inadvertently install Velixo NX (for Mac and Excel Online) on a system running Excel for Windows:
Here is how to uninstall Velixo NX.
On the Excel toolbar, go to the Insert ribbon and select My Add-ins:
From the Office Add-ins windows, click the three dots next to the Velixo add-in...
... click Remove from the menu..
... and then click Remove on the displayed dialog:
You can now download and install Velixo Reports Classic for use with Excel for Windows