ppa.launchpad.net/aheck ... 404 error

Hi,

I have, a while ago registered to the ppa for Andreas Heck, now since few months, I have a 404 error when trying to apt-get update. Here is what the error says:
'Impossible to fetch http://ppa.launchpad.net/aheck/ppa/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found'

Now when trying to list the content of 'sources.list', I have no trace of 'deb http://ppa.launchpad/*'
Looking further into: 'sources.list.d' I can find effectively: 'aheck-ppa-trusty.list' and 'aheck-ppa-trusty.list.save'

Here is what is into the 2 files respectivelly:
 'aheck-ppa-trusty.list' :
deb http://ppa.launchpad.net/aheck/ppa/ubuntu trusty main
# deb-src http://ppa.launchpad.net/aheck/ppa/ubuntu trusty main

'aheck-ppa-trusty.list.save'
deb http://ppa.launchpad.net/aheck/ppa/ubuntu trusty main
# deb-src http://ppa.launchpad.net/aheck/ppa/ubuntu trusty main

Can you please help, what should I do to correct this ?

Many Thanks,