I installed the beta 11.0.1 player but experience some problems so wanted to downgrade back to 10.3.x. I launched the downloader for the older system and wit would not let me install.
It was straightforward, but a bit tedious to relaunch my browser and go back to the adobe site to download the uninstaller, then run the installer. It would have been much simpler if the installer just officer me a chance to downgrade in one step.
Just a suggestion.