The only thing that you need to find is the dongle. If it is a USB dongle, you should be able to plug it into a USB port and use the Windows hardware manager to find the serial port it gets assigned to. You can use it with xlights directly but you might want to use FPP and a Raspberry PI as your scheduler and player. To set the start channel on the freestyle, you need to download and install the Lynx Address Utility. I don't know if it will work in Windows 10 but it does in Windows 7 and lower. The address utility and the instructions to set the start channel on the Freestyle are in the WIKI. The instructions for setting the Freestyle address is in its manual and you can find that in the hardware section. The utility is in the software section and you can access these sections from the box on the left hand side of the WIKI screen.
To use the controller, you just need to configure xlights or FPP to communicate with the dongle and set up your DMX output universe. Then make sure that your props are assigned to the channel numbers you set the Freestyle up to work with and you are good to go. Xlights will send those channels to the dongle which will convert the output to DMX and send it to the Freestyle. Make sure that your SSR4's have their jumpers set for pure non DMX SSR4 mode.