Currently I have Affinity Publisher open on my laptop but nothng happens when I click or make keystrokes. Task Manager does not say that Affinity Publisher is not responding, but it isn't. When this first happened Publisher was using more than 1 Gb memory out of 8 Gb on the laptop. The memory usage since it crashed has gone down to 54.3 Mb but I am still unable to close the program or save my work.
Update: after more than an hour had elapsed, the program caught up with itself and closed, probably because I had clicked on the cross top right while it was unresponsive. I was able to open the program and open the file again (from a recovery file) with my changes saved.