Could you elaborate on this?
Yes, I can.
The usual default settings were up side down (on two installs the settings will be different from each other and from what they were supposed to be). The GUI was unresponsive (it wouldn't close, for a start). My manual options wouldn't stick...
This happend twice in the space of 10 days (CAV 5.10).
The impression from an end user point of view is that of an amateurish approach (not mine).
My machine just had an Image backup restore; no chance of infections/conflicts... so forth.