Doing the step as you described, using the new button on the Details pane resets only that pane to default for that pane. However, if you have sharpening set to a value other than default, it also resets to default (which for me, is zero for everything. So, if I want to see say the noise change, I have to use Ctrl -Z.
On another item, I uninstalled PSCC and re-installed it but it came back with 8.5 and not 8.4. The crash still happens.
Max, can you verify as to the possibility that 8.5 might corrupt PSCC?
Thanks.