neurodoc

Problem fixed. Was editing the wrong file (from the directory of a different blog. Oops.

Find this line in the language variable section:
echo "fergcorp_countdownTimer_js_language['in'] = '".addslashes(__('in %s', 'afdn_countdownTimer'))."';\n";

And replace it with:
echo "fergcorp_countdownTimer_js_language['in'] = '".addslashes(__('%s', 'afdn_countdownTimer'))."';\n";

The only change is going from ‘in %s’ to ‘%s’

That successfully removed the word in from the output of the timer.