Theres a few section there. find it. if Pre-renewal, it will shows Pre-Renewal part
remove all # that highlighted until reach level 255. Change MaxBaseLevel to 255 since that what you want, and insert the jobs that u want to reach that level in 'Insert jobs here'. you can see example in db/pre-re/job_stats.yml originally. Example : Knight: true
Same goes to job level, edit MaxJobLevel, insert jobs, uncomment until the level that u want to reach. search until u find for HP and SP and do the same too.