1. Stop your server
2. Click "Commandline Manager
3. Click the "Custom Commandlines" tab
4. Click "New"
5. Tick the box next to "World Modifiers"
6. In the text field, enter your world modifiers...
   
   Sets chosen world modifier with value.
   
   If combined with a preset should be set after.
   
   Valid modifiers and values are:
   Combat: veryeasy, easy, hard, veryhard
   DeathPenalty: casual, veryeasy, easy, hard, hardcore
   Resources: muchless, less, more, muchmore, most
   Raids: none, muchless, less, more, muchmore
   Portals: casual, hard, veryhard
   
   Example:
   
   Combat easy DeathPenalty hard Resources more Raids none Portals veryhard

7. You can also set a preset, by ticking the box next to it and entering the desired preset in the relevant text field.
8. Click "Save"
9. Click "Select"
10. Go back to Gamepanel home page, click the "Backup Save Data" - this will save your old world.
11. Click the "Wipe Save Data" button, this will ensure your old world is gone so the server generates a new one that has your desired modifiers/presets.
12. Startup server.