Everything changed with . MetaQuotes (the developers of MT4) overhauled the language, moving it closer to C++. This introduced modern encryption and obfuscation that rendered old decompilers—including the 224.1 versions—completely obsolete for modern files. The Risks of "Repack" Downloads
Even if a decompiler works, the resulting code is often "obfuscated." It typically loses the original variable names, comments, and structure, making it extremely difficult for a human to read or modify. Compatibility It cannot handle modern ex4 to mq4 v4 0 224 1 decompiler repack