For an overview of the membership plan see IMSLP:Membership Q&A.
For more information on the reasons behind this change, see this announcement on the IMSLP Forums.
Please note that some newly-uploaded scores may only be available after a day or two to non-subscribers.
I'm the owner of the copyrights of the complete works of August Högn.
Josef Friedrich, 8. Juni 2009, Ruhmannsfelden