Why FDM does not support for 64 bit systes?

Why FDM does not have a Linux, Mac, Solaris and for other Unix operation systems version?

Why on this site the latest version seems like : 3.0 build 848 . It must be 3.0.871 ?
http://www.freedownloadmanager.org/download.htm

Also again on the download site ( http://www.freedownloadmanager.org/download.htm ) writes that the old version is 2.1. Why ? Please change it with 2.5 because 2.5 is old and it is more stable than 2.1. ?!

Why "decrease traffic usage on browser activity" does not work ?

Why "broser monitoring" does not work for new versions of ALL brosers?

Why someone does not ansswer question on this forum ?

Please we want answers...