Limitations of unregistered version

Unregistered (trial) version of AOPB works only on single-CPU systems, i.e. uses only one CPU/core at a time regardless the number of CPUs/cores installed, and does not allow have two copies of the program running at the same time. Also, once the encryption key is found, it does not allow decrypting the document (though shows the key for the future use). You will be able to do that just after purchasing the full version and receiving the registration code, without running the attack through the key space again – see Decrypting the document for details.