Found issue:

Creating a new effect or double clicking existing effect in Assets View should open the Effect Composer view. This functionality was working in 4.3.2 for Effect maker view, but not any more since 4.4.

Steps to reproduce:

• Create and save effect using Effect Composer
• Hide Effect Composer view
• Double click effect in Assets View
• -> Should focus Effect Composer view, but doesn't
• Right click in Assets View and select "New Effect" -> Create
• -> Should focus Effect Composer view, but doesn't