No configurations anywhere :/

There is no configuration page for this module, and there's no cron config page for Drupal 6 that I can find.

Is it possible that the module maintainers are assuming D6 has a cron admin page and are checking for a variable "cron_safe_threshold" that is not configurable in D6? Apologies if this is not the case. I'm marking this bug "High" priority because, well, if my assumption is the case it is high priority.

Searching the menu system for "cron" using the Coffee module I see:
/admin/build/trigger/cron
and
/admin/reports/status

Neither of which offer configuration for the variable "cron_safe_threshold."

Here's the hook menu page, you can see that there is no admin page:

/**
 * Implements hook_menu().
 */
function poormanscron_menu() {
  $items['poormanscron/run-cron-check'] = array(
    'page callback' => 'poormanscron_run_cron_check',
    'access callback' => 'poormanscron_run_cron_check_access',
    'type' => MENU_CALLBACK,
  );
  return $items;
}

So please, close this bug if this module is intentionally not configurable in any way whatsoever.

You can downgrade to get user settings, drush dl poormanscron-6.x-1.1 and settings are at /admin/settings/poormanscron.

I found this issue because I was getting notices that cron wasn't running, even though the 2x version of module was enabled (and not configurable). Now, whether that was because cron was running infrequently, like every 24 hours, or because it wasn't running at all (client may be running cron manually) I don't know.

Fixed by downgrading.