Complex sentence: The older Delphi client, Bersirc 1.4, will continue to be maintained under the name Bersirc 1.5 and the original site has been archived by the new owner, including all the old plugins and extensions.
Split into simpler sentences: The older Delphi client, Bersirc 1.4, will continue to be maintained under the name Bersirc 1.5. The original site has also been archived by the new owner, including all the old plugins and extensions.