How to Remove Calendar Widget

PC / Windows 10 -
Had a three-month calendar widget (previously called it a "gadget" . . . ummm . . . ) on my Windows 7 desktop; now have moved to Windows 10, and the widget remains (frozen) and does not change dates. I've found another calendar widget which I've downloaded, but have no idea how to find appropriate info in my system to remove the Win7 widget from the desktop.
Any info / assistance? Many thanks.