The CookTool app is primitive. There is no import function. I also find it very frustrating to program a recipe with more than a few steps that the P10 will actually carry out.
The file that contains the recipes is called the Menu.txt. If you move someone's Menu.txt into the folder that you store your Menu.txt, your file will be overwritten and replaced with the other file. Maybe in the future, Bradley will add an import function.