Didn't bother with the app
I some how doubt that the "convenient" app would run on a Gentoo Linux install and I can't be arsed to compile up Wine to see if it would. Had to take quite a few piccies of instructions and serial and product numbers and I am now reassured that mine is OK.
Mind you, would I be able to tell the difference between the heat from the usual compilathon and the battery going up in flames? Libre Office compiles seem to come close to melting my trousers.