Version 1.0 will be available for download tomorrow, September 3, at 4 PM (Central European Summer Time).
That's 3 PM in the UK, 10 AM Eastern Time, 9 Central, 8 Mountain, 7 Pacific, 12 midnight (on the 4th) Australian EST. And 10:30 in Newfoundland.
Download links for version 1.0:
(when available)
PC Version
Mac Version
These files can be installed like previous updates, i.e. there's no need to uninstall/reinstall.