How do I delete completed jigsaws on the Microsoft Jigsaws app. to be able to download more?

[Windows Central Question]

How do I delete completed jigsaws on the Microsoft Jigsaws app. to be able to download more

I have completed a lot of the sets of Microsoft jigsaws app. but it has come up with a message that to be able to download more sets I have to delete some of the completed ones. Where can I find the place to be able to do this please?