Thanks for the info!
I’ve already done all of this steps previously, ofcourse!
cub pro 11 update- check ( i’m working on it last 2 years)
cub pro 12 update from cub pro 11 - bought in May 23, not activated becouse of mentioned problem.
mails receipts - check
applications accounts - check
and final step you mentioned (grace period check) leads me to update to cub pro 13 , it says that i have opportunity to upgrade (activation manager grace period check says it) … but … it leads us to top of this topic - error code dre 426