Make sure the “Search all open Kee Vaults and KeePass databases” Kee option is enabled. If so, check if it is specific to one database - it might have an incorrect Kee home group set.
Thanks for the fast answer.
The “Search all open Kee Vaults and KeePass databases” Kee option is enabled.
With “Set as Key home group” in Keepass (on the group Database) I can switch between the 2 DBs. But I don’t get both at the same time. Do I change this in this group setting of Keepass?