Noel

When I deactivated 2018, it did warn me that I may not be able to reactivate it again on the same computer, but I proceeded anyway as per instructions.

Maybe I should have not de-registered it, just backed up the activation file from the BB Data folder then deleted the installation?

No response yet from support (bad time of the year I know). I might try on-line help or phone support when they open.

John