Ive had the same problems too with my 600. It doesnt happen all the time, but its a pain when it does. I also use GSAK to upload waypoints to my POI folder and then use the power mode to make my changes to the folder. Ive used a sequence of butten pushes on the 600 and you can do a auto power shutoff without taking out the batter, but I dont have that butten sequence with me as im at work. Hopefully someone will chime in with these sequences. Might want to a search on this furum under explorist 600 and see what pops up. Another option is there is a forum group under yahoo.
smokey