Always maintain secure backups of your .mq4 files, as these are the only official way to edit and recompile your scripts.
Instead of chasing risky decompilers, consider these legitimate approaches: ex4 to mq4 decompiler 40432 updatedl
If you lost your own source code and have only the EX4, you can try (not decompiling) your own compiled file using tools like mql4-utils – but you must own the copyright. This only shows low-level instructions, not clean MQL4. Always maintain secure backups of your
Most "free" decompilers found online for newer builds do not work. They often produce "junk code" or fail to open the file entirely. ex4 to mq4 decompiler 40432 updatedl