Directory Opus (32-bit) is a file manager and Explorer Replacement for Windows. Opus is designed to be as efficient as possible. The entire program makes use of multi-threading to ensure that you should never have to wait for one operation to complete before beginning another. As an Explorer Replacement it's important that Opus appears (to the system) just like Explorer does. Within the limits set by Microsoft, Opus achieves this and most software written with only Explorer in mind will still work fine with Opus installed.