Hi, I also bought it.
When I try to edit the gadget-file and change 15 minutes "1000 * 60 * 15" to "1000 * 60 * 5", save the file and try to install it Windows displays error message: "Not a viable gadget file". I edited with notepad++. Any special way to save the file?
You need to zip it along with all the other files in the archive and create a new .gadget file. Other than that, no, there is nothing special to do. But the windows gadget system is very buggy, so you could be out of luck, sorry :-/