I've got to go away now for the weekend but when I get back I'll study your further comments. In the meantime I'll just add the following:-
1. My Srudio 10+ Titamium edition is 10.5.1
2. It came with 3 disks, 2 programme disks and 1 Bonus DVD
3. The Bonus content was paid for and is therefore operable without further payment.
4. The programme I installed via the website was also the Titanium Edition with Bonus Content but when I did trhe install I didn't download the Bonus part based on previous advice. I had been told to do that later.
5. The S12 Transfer wizard simply won't let me run section 2 whcih allows transfer from disks. Both sections open with the same page but once it recognises all installed content has been transferred it should switch to the second page in section 2 but in my case it doesn't it just keeps going round in circles with section 1
I'm seriously thinking of doing another system restore/RegDelete to before S10, then doing a full S10 TE install again from the download complete with the Bonus Content this time (but without IDVDR and MM). Then I'll install S12 and do a Transfer. That way I should get the Bonus content and avoid this problem.