The pop up for the assigned colour profile seems to be cause a serious error that causes affinity to hang during a multiple PDF import scenario...
Steps to reproduce:
Select multiple PDFs in Finder
Right click and open with Affinity Designer
Program crashes unable to click or perform actions
Workaround
Open each file using same method above individually making sure to dismiss the colour profile assignment popup before opening each file.
It seems to happen pretty much all of the time and I think it's the colour profile thing but I can't be sure, however the steps above usually reproduce this. I have also attached a screenshot of the console log. I would really like to know why I can't open multiple PDFs at once (in this case it affects single page PDFs and multiple page documents too).
Affinity 1.6.1
MacOs Mojave 10.14
MacBook Pro (Retina, 13-inch, Late 2013)