WinSPM is not a very well-written piece of software. Often if trying to "apply" a moderate amount of label changes in the Qucik Access mode, it will lock up, give an error, and fail to complete the task. In your situation, try the task again, and you may achieve success. May want to try using the quick access as an alternate method if you are currently in the standard mode, or vice versa. The sorting of sites, would be nice too, MM. Some guy claimed that he could sort the db offline then upload it with the sorting accomplished. I've never don it my self though.
Pepperz at newper dot net