Transience of File Collections

Maybe someone can help - after I had a problem w/ my dopus crashing and deleting all the members of a collection, I found out that it is only after you completely exit DOpus when the collection file gets saved. That means, if you are spending an hour putting files in a collection, and your dopus crashes, you are s.o.l.

The files are .col, are text files, and just have the paths listed in them. On my system, they are in:

C:\Documents and Settings\rcogley\Application Data\GPSoftware\Directory Opus\Collections

Is there any way to make DOpus save these files in the middle of a session?