Revert "small gui_getWindow fix."

This reverts commit 64198d3352b1177806bc15b1ae8cd443196e1e90.
Revert "Version update to 5.3"

This reverts commit 0f08c51288bef1eb49e00b26266261e8bc817d80.

Conflicts:
	Plugin/Win32API.bundle/Contents/Windows/Win32API.rsr
	Plugin/Win32API.bundle/Contents/Windows64/Win32API.rsr