Hi Nicholas
Thanks for everything, I now have 3.4.3 installed and working.  The reason I ran into problems was that I received  several emails notifying me "To install the update" and I clicked the link without realising it was an Alpha version.
Is it possible to
- Only be notified of Stable Releases or
 
 
- Turn off notifications
 
I have Akeeba Backup Professional installed on several of my client websites.  I only recently purchased the Pro version.  I intend to install it on all my client websites in the coming weeks.  This will mean I get lots of emails so would prefer to turn this off in most  cases any only have it activated on my own website so I can be notified of updates.
I will always check in future to see if its Stable.  Had to learn the hard way!
Thanks 
Lucylyn