I have just upgraded to 2015 SP2.1 Premium (from 2012).
When I open an assembly last saved in SW2012 & try to save it SW hangs & no dialogue box appears to ask whether I want to update all the associated parts etc.
(Colleagues who do not have premium see this dialogue box ok.)
SW hangs until I hit Enter & then moves on ok. Unfortunately I have no idea what I have accepted by hitting Enter.
I have a laptop & seperate monitor but the dialogue box does not appear on either screen.