Now I don't see corona plugin files in your add-on folder?
corona plugin files are in the folder C:\Program Files\GRAPHISOFT\ARCHICAD 22\Расширения ARCHICAD
You should understand that if alpha 3 works fine with a localized version of archicad, then corona developers have changed the code in alpha4 files.
As a result, the corona plugin stopped working on localized versions. I see one way out or install the English version of archicad or wait for the developers to change this bug in alpha 5!