The "LMB" breadcrumb is not active within any of the "tools" in the tools/ directory. This is a really minor thing, but would be handy if the "LMB" breadcrumb worked to take you back to the LMB main screen.
Also, on a related note, when saving the settings on the main LMB digester settings page (admin/enrol_config.php?enrol=lmb)
it takes you back to the "enrollments" page, : admin/enrol.php? - I guess that's just a preferential thing, I'd prefer it to just save and refresh. (Maybe could have 2 buttons: one to save, one to save and return to enrollments page?)