How to remove old epson software from iMac?
The solution that worked (for other users):

Follow the instructions here:


  
  From the Apple menu, select System  Preferences.
  Click Print &amp; Fax.
  Highlight any Epson printers and click the ￼ button to remove them from the Printers list, then click OK.
  Open the hard drive 
   
  Select Library > Printers.
  Select the folder labeled EPSON and drag it to the trash.
  
  
  Note: This will remove all installed Epson printer drivers. You’ll
  need to reinstall any printer drivers that you still need.


If the software is still on your computer then try using the uninstaller.

This should completely remove all the software.