update Twonky

Hi guys as you can update the version of Twonky located on firmware ???
I downloaded twonky-i386-glibc-2.2.5-8.1.2.zip I have to replace the previous version? but where is it?
Thanks for your help
I downloaded twonky-i386-glibc-2.2.5-8.1.2.zip I have to replace the previous version? but where is it?
Thanks for your help