I have this exact problem, accept all my shortcuts are there, the .dat file looks fine and very full.
However not a one of the programs on my long list, including notepad, will open! They all give me the not found message.
The only thing I have been able to open for some odd reason is mspaint, and only if I type "open mspaint" it wont even open it if I do "open paint" basically the entire function seems to be mis-firing.. please assist, I am getting very frustrated!