The version number refers to an old build of the MetaTrader 4 compiler. Years ago, decompilers were highly effective because the encryption on .ex4 files was relatively weak.
If you purchased the EA, most developers will provide a replacement if you prove your purchase. ex4 to mq4 v4 0 224 1 decompiler repack
Searching for an is a trip down a dangerous path. The software is a relic of an older version of MetaTrader and is no longer effective against modern protection schemes. More importantly, the "repacks" found online are high-risk targets for malware. The version number refers to an old build
Check your "Deleted Files" or "Cloud Backups" (Dropbox, OneDrive) for the original .mq4 file. Final Verdict ex4 to mq4 v4 0 224 1 decompiler repack