Skills now work with skill points, as in Ragnarok Online 1.
Every job level gives you 1 skill point for that job. Open the Skills window: it now lists every skill of your job. Click the gold square next to a skill and confirm, and the skill goes up one level. The points are the only limit. No job level is needed for a skill level, so you choose freely.
Your weapon mastery stays at level 1 for free, so you can always use your job's weapon.
Skill books and skill EXP are gone. At your first login your skills are reset once, you get all your points to spend again, and the money you paid for skill books comes back as Rufi. Skill books that are still in your bag or storage are exchanged for their price.
Changed your mind about a build? Talk to a skill master, open Skills and choose "Reset skill points". It costs 1,000 Rufi and gives back the points of the job you are in.
Start the launcher to get the update.