workarround
Delete the plane
redownload the plane, when it gets stuck unzippen via inimanager
go in the appdata folder: C:\Users\matth\AppData\Local\iniManager\app-2.4.5\resources\app\temp
find the temp file "1192-full", unzip it there
copy entire file via powershell to commun,ity folder
let inimanager install again and the plane becomes installed again with update 1.1