look closely as what ad aware is removing, 10 bucks says one called "wudata". It picks it up as a useless file and deletes it. I think it contains info about your work unit and when you delete and restart it forgets what it was doin
to help with the disappearing work units after shut down, I made a folder in my F@H folder called backed up work. Before I shut down I copy my work folder and paste it in there. Then when It resets the next day, I just replace my work folder with the one i backed up last night. It worked twice so far for me. Hope that helps.