I am again so grateful !
My old TT One V2 who is well past the age of majority :fy: and is therefore largelly capable of continuing its work will do it !!
Many many many thanks to all of you in this wonderful forum !
No virus problem detected in Optimize_nav3 package
Europe_1115_12045 working very well on TT One V2 9.541
Tryout on 8.560 navcore ongoing ...