So… I upgraded to 2.1.18-cbt, then rebooted (twice). I see am on the new version, but the backups are taking the same amount of time. So I checked the client but it reports “Volumes without change block tracking: C:”. So I found this thread CBT disabled after live disk resizing - #9 by TomTomGo and tried the suggestion from TomTomGo.
However, it did not work, here is the error:
C:\Program Files\UrBackup>urbctctl.exe install C: n-c
Driver installed successfully
Unlocking bitmap file failed. Err: 1
Cannot create bitmap file. Err: 32
Unable to install bitmap file
As always, I am grateful for the software and your help!