When I follow a link for the release notes for Composer XE 2015, there is an entry for Update 3. Reading the notes there is a date of April 9th in the document. However, there doesn't seem to be an option to download Update 3, only up to Update 2. I'm particularly interested in Update 3 because I'm on OS X and accidentally installed Xcode 6.3. So is Update 3 going to available in the near future?
Thank you for your interests in Update 3. You are right that Update 3 hasn't been released. It will be avaialble in the near future, I believe. However I don't have an exact date of the release yet.
Windows compiler appears on download menu today. I installed them successfully for both Windows and linux.
On Windows 10, many temporary files require individual administrator privilege grants to clean up.