Probably the database of XS++ does not have your IMEI, but you can see your phone is detected as a W580. You can try to do an identify with setool2lite to verify this.

The files you are trying to find are OK. To find them, you can buy a premium account here or make your way through the forum to gain access. Just remember Main (Generic) and FS (America 1) need to be uncompressed.

You can search for the XS++ guide here in the forum.