This thread has now been closed to direct all further updates about this release onto the latest announcement:
Please see https://releases.xamarin.com/alpha-release-1/ for the details about this release, including the steps to update or downgrade as needed.
Note: This early Alpha version is not yet specifically aimed at addressing bugs in the recent Cycle 9 release to the Stable channel. Work is in-progress for another set of builds that will include additional bug fixes for Cycle 9.
This is an early preview version, so it likely contains a number of issues that will be caught and fixed during the normal internal testing and development process. Of course additional bug reports are still welcome.
Please file a quick bug report using the current "Feature Preview" new bug form if you see any suspicious behavior in these versions that you wish to report.
Comment in this forum thread if your question is not related to a suspicious behavior after download, but instead one of the following: