I'm not aware of any reason it shouldn't work software wise ... one possibility is that the units mode switch is depressed, its behind the front panel that the LEDs can be seen thru and connects to the LCD display board, but I don;t think the inverter would operate in this mode.
I would also check that the RS232 cable didn't get damaged or that when the inverter failed it damaged the RS232 port of the computer doing the logging
GT-View is not supported but feel free to down load
http://www.solar-guppy.com/forum/viewtopic.php?t=548.
One new feature is the comm debug window in SG-View. To use it, set the correct comm port in the settings, select the debugger and press halt. you can now type in commands and see the GT's response. for example, type IDN? and you will get model and firmware revs. once done, hit resume and exit the comm debug window.