The Download Now link directs you to the Windows Store, where you can continue the download process. You must have an active Microsoft account to download the application. This download may not be available in some countries.
From Domenico Rescigno:
mrRemote for Kodi is no longer the simple remote control that you knew, now it is much more complete, much more simple and simply beautiful. mrRemote for Kodi has been updated to become one of the best Kodi/Xbmc remote control for Windows 10 and Windows 10 Mobile. It is simple to use and easy to control both with mouse or touchscreen devices. With mrRemote for Kodi, you can control how many Kodi/Xbmc media center you want, without any limitations. mrRemote for Kodi is free and ad-free, no one has to pay or is forced to do if he doesn't want, anyway if you like you can support development by small donations. If you find bugs, please do not hesitate to contact me to solve them as soon as possible.