Not sure if there's a way to turn it off.
Here's what I would do:
Import a rendered frame and composite using just that one frame. Don't check "image sequence"
When your render's done, replace the footage with file, and then select your image sequence.
Thanks for the hint caseyinhd but it's not really solving the problem, it's more like a work-around.
It gets really frustrating actually and slowing down my workflow.
You could just create a dummy sequence and then let the renderer overwrite those dummy files? Not saying that you should have to do this, as AE's sequence handling indeed sucks big time in that regard, but it would be an appropriate workaround.
While it might be a workaround it's not usefull, I got a ton of filesequences rendering here and every move I make I get the popup. I cant just for the sake of it make x-amount of filesequences times the amount of passes, I'd have to hire an assistant just to do this due to the amount.
I want an option to not check updates.
Exact same issue here and it is very annoying..
There is no solution for this?
Seriously limits workflow here too