Hi Paul.
Sorry if I was a little rude, but the elicenser definitely is not my favorite dongle management software. After turning the Mac off and on several times, disconnecting and reconnecting the Vienna Key, the licenses miraculously reappeared and I transferred them immediately and manually, one by one, to the replacement key (before he had second thoughts). Anyway I remain of the idea that the iLok may not be perfect but never created compatibility problems and loops of error messages..
Thanks for the support, I have already written to customer support to deactivate the old Vienna Key.
Roberto