Up to and including v9.0.3, SellerDeck (the new name for Actinic) only officially support up to Dreamweaver CS3. Sites that open SellerDeck from Dreamweaver CS4 (also known as Dreamweaver v10) will not encounter any problems but users will not be able to choose 'Edit Layout in Dreamweaver' from within SellerDeck .
Dreamweaver CS4 is supported from v9.0.4 onwards.
Dreamweaver CS4 is supported from v9.0.4 onwards.