If this is because the CPU is faulted, and you need to transfer the program to a replacement CPU, then check if there is an EPROM memory module in the faulted CPU.
Are you sure about the part number? is it a 5/04 ?
If yes then your cheapest way is to find a local integrator to just upload the program for you and back it up (give you a PDF and software copy) if you do not need to change the program its going to be a lot cheaper option then buying the software