The problem has been fixed as soon it was reported, so it's not happening again, and since the installer can update itself automatically, you should get the fixed version if you start it again.
Having the Community folder listed with the \\?\ prefix is not a problem, it's the standard Windows notation that allows to support extra-long file paths that can happen with some 3rd party liveries with very long names on their own, if you installed MSFS in the default already very long path. Now it's no longer a problem.
