RossW wrote:Is there a way to confirm what was my earlier version?
The only way I can think of is if you have older VBox.log versions, i.e. VBox.log.1, .2 and .3. That's a certain, if you look at the first line of those logs.
Another possible way would be to look at the ".vbox" file, again with a text editor (do *not* modify it). If you look towards the end, you'll see something like:
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxControl.exe" value="5.1.26r117224"
So for example this guest was last updated with VirtualBox 5.1.26, rev. 117224. But that requires that you've kept the Guest Additions up to date.
Before downgrading, can you please post a list of the contents of the "Snapshots" folder in the VM's folder? Right-click on the VM, Show in Finder, navigate to the Snapshots folder, tell me what's in there. Or even better post the output of the command "
ls -alR" executed in that folder...