A: No. All genuinely free decompilers are outdated (pre-2014) and will not work on modern EX4 files. Any website promising otherwise is likely distributing malware.
During compilation, MetaEditor removes comments, simplifies logic, and optimizes variable names. Even if a tool could reverse the file, you would likely get a mess of rather than the original, readable code. Corrupted Logic: Free Ex4 To Mq4 Decompiler Zip