It would be nice if they made a video demoing how to use this. I like the idea but don't really get how this particular extension is used. When you save sessio

It would be nice if they made a video demoing how to use this. I like the idea but don't really get how this particular extension is used. When you save sessions is there a way to modify them later? or is it assumed you'll delete them and save again each time you change them?