@Callum Thanks! I tried opening the file in a new profile on my mac and it worked there too, since the linked images weren't there. So I had a look and resaved the psd files (3 files) as afphoto files, removed the psd files and opened the document again. It didn't crash then, just told me it was missing some resources, confirming that the problem was with the images. I then replaced those images using the resource manager and I haven't had any crashes since! So thank you for helping me figure out where the problem was Not sure why those images were a problem though, but at least it works again!