Looks like when running the script from HKLM/RunOnce (thus: logged on!) is doesn't install and when i run the script when i have a desktop it runs fine (with $object.Shell('Action').

Seems that this shell doesn't behave the same as the KiXtart Shell, because using the KiXtart Shell (and KiXforms 2.2.0) gave no problems !
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Kind regards,