Ex4 To Mq4 Decompiler 4.0.432 - Updated ((link)) -

: This specific decompiler version primarily supports files compiled with MT4 Build 509 or lower Modern Failure : It cannot decompile EX4 files created with Build 600 or higher

If you are looking for an EX4 to MQ4 decompiler just to see how an EA works, consider these safer alternatives: Ex4 To Mq4 Decompiler 4.0.432 - Updated