It will do a process real quick to see if there are any mods installed. To start it up, just double click on the icon and then click the Install/Uninstall button.Make certain you already have it installed on your PC and started up before continuing. (On Linux/MacOS you need to make a virtual console of a 64bit Windows to use Project Lunar). 32bit can work, but you also might run into driver issues. Make certain one end of it is already plugged into the PC. The one supplied with the Sega Genesis Mini is not capable of data transfer, nor is the Playstation Classic microUSB cable. A different microUSB cord that actually transfers data.