Since you said you were UPGRADING, he assumed you already had EvolutionX 1.8.458 on your hard drive, and you want to replace that with the new EvolutionX 1.8.3285. Therefore, you could ealily just FTP the new dashboard over the old one, along with the evox.ini.
You had to put EVOX .458 on a CD-RW (or such media) to FTP it to your hard drive one long day ago, right? So just pop in that CD-RW (or such media) to boot up, and replace the old version with the new EvolutionX using an FTP program.
It's the same thing you did as before; nothing new (except a laid out easy start). Just make sure the evox.ini is edited, so that it's conveniently how you want it.
Hope my jibberish wasn't too cluttered.