How to restore a Canvas app from a *.msapp file

[VictorSotnikov]

I have accidentally deleted a canvas app. But I have MyApp.msapp file I had downloaded from the App.

How exactly can I restore the App?

[zmansuri]

I could not find this option directly. So here's what you can do. Create new canvas app. Then select open and select browse and choose your msapp file like shown in picture.