You need to have the tools to de- and encode the .ask files of Asakura! P to use this

Please test if this works and how the map dragging perfomance is. If it is abysmal on slower computers I will have to look into optimising that.
Copy the 'data' folder (the entire folder, not only the files it contains), which is extracted from data.ask, into the same folder as gen.exe and all the other stuff and start it up.
The first MP button is 'Open' (opens an Asakura P .map file), the second 'Save' (saves as .map) and the third 'Close' (closes the currently loaded map). 

Map Controls:
Left Click        : select one tile
Left Click + Ctrl : add tile to selection
Left Click + Shift: add tiles in area to selection
Mousewheel up  : Zoom in
Mousewheel down: Zoom out 
while holding Alt drag with Left Mousebutton: drag map

Selections should be made on the Map panel (for now) or else the selected tiles won't show up. A means appearance, P means property.
In the Edit selected dialog, -1 and --- means 'keep'. If you selected tiles with different properties/appearances, this (should) let them keep their properties/appearances. Useful if you only want to modify either A or P.

You can resize the window as much as you want, nothing should break.

There are still quite a few bugs and there is a fair amount of features I have yet to implement, so I don't take complaints yet (except for those stated above)

Ignore the console window that pops up with the window.

If you want to take at the source code, it's in 'gen.py'