Yes. When Updating Collection or Collection Summary Add/Update. Under "Choose an action..." choose "Move all cards in Collection to For Sale/Trade List" or "Add all cards in this set to your collection". Depending on what you want to do.
NOTE: anytime you have a problem and something goes wrong and your collection gets screwed up; stop what you're doing and send a message to Admin. They can revert your files back to a timestamp and get everything back to the way it was before the problem.
Someday my cards may double in value and then be worth half of what I paid for them.