It took two and a half months, but the Avsim File Library is back online. Some files still remain unavailable, and others are" unrecoverable," although they say they "are working on the problem." Avsim has released a Q & A on its forums about the status. If a file isn't available on Avsim, we won't be changing our links until we know it's permanently lost. In the meantime, we will be adding links to files on other flightsim websites.
This topic is being discussed on the Message Boards.