Hi,
I Don't know what other user think... but for the first time, I finally understood how migrate plugins and script from an older to the newest version installed.
Because I must say that when you launch for the first time the newest version of after-effects, the pop-uyp that is asking you what do you want to do with the plugins and script is not enough clear.
One of the button is blue and very attractive for your eye. But this is not the good button to migrate your script/plugin folders. The grey (oldest version of AE) is the good one.
Maybe adobe should consider this as it's not clear.
(Hope I'm Clear enough) 😉