AROMAT has two programming environment choices: GR (basic),and FPWIN-Pro (advanced). Both programming tools use pre-compilation before the application is downloaded to the PLC. This is much like generating EXE application out of "C" code. In the case of AROMAT, unlike most other PLCs, if you upload the program from the PLC it is virtually impossible to follow the code, because you lose all symbols and program structure such as calls to functions - everything is blended into one machine-code file. Even if you understand the machine code, you will not be able to modify it and download back to the PLC. In the AROMAT system a program must pass complication before downloading. This means that you must have the source code of the program, so don't waste your time on code uploaded from the PLC.
The AROMAT PLCs are actually very good. Inexpensive and very fast. Aromat is part of the Matsu****a group that belongs to Panasonic.
I don't know a way around the password protection problem. But if you have to re-program the PLC then use the FPWin-Pro and not GR.
you could try 1-877-NAiS-TSC (1-877-624-7872), Aromat tech support.
Good luck.
A. Harel.