I've tested the software on Windows 10 x64, but it doesn't work, although I managed to install the driver and the application. It needed Adobe Air to complete the installation, but after it finished it, the software gives an error. I suspect this is the case for Windows 8 as well.
However, there is an updated version on their website. You can download it through the following page: https://www.boss.info/global/support/by_product/me-80/updates_drivers/6bd2c486-1b74-443c-a680-5cc030e6b3e6/
Note: Adobe Air is also a must to install it properly.