Newbie problem... other answers don't cover it

What do you mean by that? Is there a place in the converter where I change a setting or something?

 

I think he meant that you needed to change the world format setting to anvil in pocketmine.yml...

 

You thought right.

 

I have used a different converter and I switched the format to anvil. The arena is still extremely damaged and cannot be used. Would it be possible for somebody to take the world I uploaded here and switch it to a format compatible with Pocketmine? I think i remember somebody doing that for a different person with this problem.

 

HELP ME PLEASE i would really like this world to work tomorrow