Thank you for your prompt reply,
I have downloaded MCUxpresso meanwhile and my existing CM0/CM4 projects have compiled without any issue. Seems to work fine - Good news.
Great idea having dropped the (useless) licensing mechanism at last !
Info: it is currenlty impossible to get a new license number for LPCxpresso - broken link ! - One of my customers is currently stucked.
Regards,
Michel Kuenemann