Epson Printer Utility 4 not installed

I've been using an Epson XP-400 Printer for almost two years, on my old Macbook Pro with Mountain Lion and now on my new Mac Pro with Yosemite. Everything was working fine until recently when I was unable to print anything from my computer. The printer was being listed as "Not Connected" despite it being on and connected to Wifi. I tried rebooting both the printer and computer, which has worked in the past, but this time it didn't.

I removed the it from available printers in System Preferences and re-added it and selecting the proper driver. Now, it shows up as "Idle, Last Used", but anytime I try to print something the printer queue pops up quickly and disappears while the printer itself does not print. When I try to open Printer Utilities, I get an error message saying that Epson Printer Utility 4 is not installed. I've tried re-installing at least two more times, each with the same result.

Please help!