Create new folder in your computer (anywhere can be desktop or documents) name it
Apex.
I guess you can log in to your apex using your computer (if not I'll tell you everything step by step).
First go to configuration > load/save then press select all and on the bottom save configuration.
Name it "apex January 2014"...
Now go on
Neptune systems website and download latest firmware and save it to the Apex folder.
Unzip in the same folder then you gonna find file named apex flash utility press it...
Now you gonna see few things,
File name: you don't have to do anything here cause if you'll unzip everything to the same folder flash utility automatically gonna find .hex file
Network address: make sure you will print here your apex IP address, if you don't know it press small icon (with magnifier) if this method gonna fail use apex display to check your apex ip.
HTTP port: usually 80 but not always so check your pressing configuration > network setup
Now username: admin from factory if you have different print it here
Pass: 1234 from factory if you have your own print it here...
Now you are ready to press update firmware button.... It may take up to 1 minute
If everything gonna go smooth and you have firmware updated pres button update web pages this can take even longer than firmware
That's all
Lmk if you have any questions...
One more thing, after update reset your browser history because you not gonna be able to see changes.