Upgrade accde from 2013 to 2016

[aldol]

Hello,
I need to upgrade 2013 accde into 2016 accde. I tried Save as but all types are greyed out so it's not working. Please advise if anybody might know how it could be done.
Thanks

[CJ_London]

you can't upgrade a .accde, you need the .accdb in 2016 and save as a new .accde

But 2016 should run a 2015 .accde unless it is using features no longer supported in 2016