On a sidenote, in case anyone happens to come across this problem...

if you get the following error:
Fatal error: Call to undefined function ep_datoriser() in admin/easypopulate.php on line 1747

just find line 1747, and replace ep_datoriser with zen_not_null

I will be doing a patch update and uploading to the add-ons section so no-one else has this problem.