Sergio1,yes your right that
s1fwx only support version
3.xx.xx firmwares good reading though.About
s1clone,it's not too perfect for a tool so you shouldn't expect something good.Developer's release notes on
s1clone stated that that tool is buggy so it works on a player and it does not on other player.The best thing to do to relive your player is to look for a full suitable firmware.Try finding your firmware on
www.s1fw.com