The most recent drivers for the Edimax EW-7612PIn wireless network card can actually be found on the RealTek website. The Edimax website is not very reliable and the links seem to be broken or to the wrong files. The card uses the RealTek chipset so might as well get the driver direct from RealTek as it will normally be more up to date than the one from Edimax.
Go to http://www.realtek.com and search for:
Scroll down to the software link and then it will give you a list of different drivers. Avoid the one at the top as this is for SU. You want the SE one.