Evilnat has updated SEN Enabler to v6.0.3 followed by v6.0.4 after the recent update by Sony when they issued PS3 Firmware 4.81 to the public.
SEN Enabler v6.0.3 Download: SEN Enabler v6.0.3 [CEX-DEX] [4.81].rar / SEN Enabler v6.0.3 [CEX-DEX] [4.81].rar (Mirror) / SEN Enabler v6.0.3 [CEX-DEX]...