Epson profiles are stored in a package in the system library. To find any ICC profile installed on your machine, just open the ColorSync utility and it will list where the reside.
Prints that are darker than display: http://www.luminous-landscape.com/tutorials/why_are_my_prints_too_dark.shtml
NEVER let Apple system update's mess with Epson printer drives. Going back might take a bit of work like resetting the print system (In Print and Scan, Control Click and select Reset Printing System...) then download and install the actual Epson drivers from their site.