I just very recently updated to 12.17 from 12.16, and ever since I've been getting this strange behavior where DOpus "forgets" label color properties I've set to files until I close the lister and reopen it. To be more specific, I use the Properties SETLABEL command to color code files. I haven't been able to pinpoint if a certain thing triggers the resetting, but usually after an hour or so of working I notice that suddenly no color labels are shown (it's not specific files that fail, it's always all of them until I close and reopen listers).
Any ideas as to what might be causing this?