There was another bug in property handling which needed a PPU update, so same procedure as before: recompile all source which use properties (this change causes an error if you don't recompile)

Today I fixed a bug in property handling, it requires the recompilation of all units exporting classes with properties. I didn't change the PPU version number. If you get strange errors regarding properties, try to recompile everything, if you still get errors I had introduced a new bug, so inform me :)