Complex sentence: On 26 September 2013, BBC iPlayer Desktop was replaced by BBC iPlayer Downloads, the new application was no longer based on Adobe AIR and on the same date the BBC stopped making programmes available to download in WMV format.
Split into simpler sentences: On 26 September 2013 BBC iPlayer Desktop was replaced by BBC iPlayer Downloads, which was no longer based on Adobe AIR. On the same date the BBC stopped making programmes available to download in WMV format.