j'ai pris contact avec les developpeurs j'attends une reponse 

thank you, but the licenses for new plugins will not work lol

I have contact with the developers I expect an answer

not at all I bought 3 new licenses for another site.

but every day the site says, it is not valid, then it works very well with the installation.

excuse me for my english I go through Googe

The three licenses in question

ip site is good

by against the purchase date is the date of my first purchase in 2014

these licenses to work very well in the installation of plugins, but after 24 hours, I have a message on the website that tells me to enter a valid license

I have two sites and bought 3 new licenses for the second, last week after updating when I realized it needed a license per site

everything else works well

I asked at the beginning of this post to whether to account for site-license purchases to another site, you answered me not.

I have therefore bought with the same account

if you have access to shopping, you'll see it's three licenses are purchased 2 times, they are not identical

at the first site everything works

but not on the second

you should know that at the first site I had to redo everything because I was full of 500 error

  and that at the second site updating worked

et maintenant je dois réinitialiser la clé et pour les trois plugins