Another Major Problem

This time its alot more seriouus. I went onto My Documents and then to NL and it changed to a different folder (apart from the one with the blue track on it) so i said "open with" and it didn't have the "NolimitsSimulator.exe" choice so i searched for it and i click it and nothing happens I have tryed everything and noewi have to open it with NL EXplorer and it doesn't work/. You must know theat i did transfer this from my old comp so i dont know if it has anything to do with it.

Ill probably give 250 points to anyone that finds the solution.

Thats how desperate i am!