Can you please clarify what you are looking for?
You said R2 firmware for your SoftPAC.
The R2 is the rack mounted controller. Firmware is upgradable via the usual download, where as, since SoftPAC runs on a Windows PC, you need a new .exe to get an updated version.
They are two very different controllers and thus the firmware update process is very different.
Lastly, I am wondering what features you are looking for in the 9.3c version?