I've installed Easy Populate CSV on a Zencart v1.5.3 system without success.
I have copied all the files. I go to Admin -> Tools -> EasyPopulate.
It prompts to install by pressing click here (as expected) once I click it I get:-
WARNING: An Error occurred, please refresh the page and try again.


This is a freshly installed version of Zencart, no additional mods at present.