05-18-2010 04:48 AM
This is possible. Please see this entry in the KB. (article 22168)
Hope this solves your question. If so, please do not switch your entry to 'solved'
05-22-2010 04:51 AM
Basically you downgrade the Premium to Standard as per the link above in the old version.
Then open the standard database in ACT! 2010 and it will upgrade it.