A little searching on the web suggests puting it in C:\Users\Public\Documents and then a Saitek directory that doesn't exist because the software I tried to install turned out to be nothing more than a Reboot button. Saw that there was an ED profile but no instructions on how to install it. Downloaded the Profile pack and opened the zip.Clicking this immediately and unceremoniously reboots the machine, after which the software is nowhere to be found. It just chugged a progress bar for a few seconds and then replaced it with a 'Restart' button. I donwloaded the Software as recommended by Logitech and this seemd to do nothing other than reboot my PC.MY shiny new X52 Pro arrived today and I have to say I haven't a clue what's goimg on.