Maximum Map size

[WizzyT]

Is there anyway to increase the current maximum world size?

As it stands my imported project uses a World map of 500x400.

When I attempt to edit my world map properties it resets back to 256x256

 

[Volz Rocksti]

It took me a while to find it again, but there was a discussion of this in a previous thread. Check it out here: http://forums.rpgmakerweb.com/index.php?/topic/46338-map-sizes/

 

[Andar]

When I attempt to edit my world map properties it resets back to 256x256

What do you need to edit in map properties? Because as it stands of now, the easiest way would be to edit them in Ace and convert again, but that won't work if you already changed them in MV.
The alternative might be to edit the map properties with a text editor in the json file instead of using the editor, but that has other problems.