decrypting an AES-256 zip file created with Directory Opus

I can't code. Attached is a zip file created with DOpus. Only 7zip and Dopus can decrypt it. Windows Explorer cannot. I found no program that could crack it. The password is "mmx". 

Is there an easy way (for non-experts) to crack it?


Attached Files
.zip (Size: 476 bytes / Downloads: 4)
The file was created with DOpus 11.19. Somebody told me via PM that the most current version of DOpus (12) no longer seems to create zip files of this type (that Windows Explorer cannot decrypt, only 7zip). Someone else also told me the file has been created with PKWARE.