Well, if the folder does not exist, that is your problem. The issue now is to discover what is causing it.
The first thing is to make absolutely sure that you looked in the correct User Account folder. When you are in your normal User Account, open the Run command (Windows key + R), and enter %LOCALAPPDATA%. From what you say, you should see no Eraser 6 folder in the Explorer window that opens; if do do see the folder, open it and delete the task list. If not, proceed as follows.
I assume that you are not preventing Eraser from running at start-up, which it needs to do. If you are getting the crash as soon as you install Eraser, that is not the problem in any case.
I don't know (Joel will) at what point the folder should be created; I suspect that it is when Eraser first runs, which would indicate that something is blocking Eraser from the outset. The most likely culprit is detritus from one or more previous Eraser installations. Sadly, this means uninstalling Eraser, and then doing a clean-up. Delete all files and folders (especially in Program Files) referring to Eraser, that you can find, then clean the Registry. If CCleaner is not finding the problem (make sure you use its registry cleaner, not its trace cleaner), try another Registry cleaner; there are a number of freeware cleaners available, and in my experience they all find different things. If you feel able to use the Registry Editor, open it and search on 'Eraser' (Ctrl+F to start the search, F3 to find the next instance); you can delete any keys that refer only to Eraser, and any values referring only to Eraser in keys referring to more than one program. Then try reinstalling.
Beyond that, its over to Joel, I fear.