I'm pretty sure that it doesn't work. But the other way does (i.e. projects saved in v10, opened in v11). Tested it myself a few months ago. It will convert it into the new format, and, if I remember correctly, it will tell you that it's not going to work in earlier versions after the conversion takes place.
Last edited by DSpider; 09-25-2012 at 11:34 AM.