Flex SDK 3.5 support

Hello,

I would like to know if there is any due date to which the Adobe Flex SDK
3.5 will continue to be supported by the adobe flash player.
I dont know if this is the right way of asking this question, but we have a
very large Adobe Flex app. In the past few years we have been discussing to
move it to a newer SDK or to directly change technology (HTML5) but it has
been really hard, and find us in a position where with a reduced team we are
just maintaining that app.

So wanted to know if someone knows if there is a due date in which the
compiled swf will no longer continue to work properly in the newer version
of flash player.

Thanks in advance.

Fernando